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  <title>WebRequest API - Google Chrome Extensions - Google Code</title></head>
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            Undocumented.
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            Description of this parameter from the json schema.
          </dd>
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            This parameter was added in version
            <b><span></span></b>.
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            and you may omit it in any version.  If you require this
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      <div id="pageTitle">
        <h1 class="page_title">WebRequest API</h1>
      </div>
        <!-- TABLE OF CONTENTS -->
        <div id="toc">
          <h2>Contents</h2>
          <ol>
            <li>
              <a href="#H2-0">A note about timestamps</a>
              <ol>
                <li style="display: none; ">
                  <a>h3Name</a>
                </li>
              </ol>
            </li>
              <li>
                <a href="#apiReference">API reference: chrome.experimental.webRequest</a>
                <ol>
                  <li style="display: none; ">
                    <a href="#properties">Properties</a>
                    <ol>
                      <li>
                        <a href="#property-anchor">propertyName</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#global-methods">Methods</a>
                    <ol>
                      <li style="display: none; ">
                        <a href="#method-anchor">methodName</a>
                      </li><li style="display: none; ">
                        <a href="#method-anchor">methodName</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#global-events">Events</a>
                    <ol>
                      <li>
                        <a href="#event-onBeforeRedirect">onBeforeRedirect</a>
                      </li><li>
                        <a href="#event-onBeforeRequest">onBeforeRequest</a>
                      </li><li>
                        <a href="#event-onBeforeSendHeaders">onBeforeSendHeaders</a>
                      </li><li>
                        <a href="#event-onCompleted">onCompleted</a>
                      </li><li>
                        <a href="#event-onErrorOccurred">onErrorOccurred</a>
                      </li><li>
                        <a href="#event-onHeadersReceived">onHeadersReceived</a>
                      </li><li>
                        <a href="#event-onRequestSent">onRequestSent</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#types">Types</a>
                    <ol>
                      <li>
                        <a href="#type-RequestFilter">RequestFilter</a>
                      </li><li>
                        <a href="#type-BlockingResponse">BlockingResponse</a>
                      </li>
                    </ol>
                  </li>
                </ol>
              </li>
          </ol>
        </div>
        <!-- /TABLE OF CONTENTS -->

        <!-- Standard content lead-in for experimental API pages -->
        <p id="classSummary" style="display: none; ">
          For information on how to use experimental APIs, see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
        </p>

        <!-- STATIC CONTENT PLACEHOLDER -->
        <div id="static"><div id="pageData-name" class="pageData">WebRequest API</div>

<!-- BEGIN AUTHORED CONTENT -->
<p id="classSummary">
Use the <code>chrome.experimental.webRequest</code> module to intercept, block,
or modify requests in-flight. This module is still very much experimental. For
information on how to use experimental APIs, see the
<a href="experimental.html">chrome.experimental.* APIs</a> page.
</p>

<a name="H2-0"></a><h2>A note about timestamps</h2>
<p>
It's important to note that some technical oddities in the OS's handling
of distinct Chrome processes can cause the clock to be skewed between the
browser itself and extension processes. That means that WebRequest's events'
<code>timeStamp</code> property is only guaranteed to be <i>internally</i>
consistent. Comparing one event to another event will give you the correct
offset between them, but comparing them to the current time inside the
extension (via <code>(new Date()).getTime()</code>, for instance) might give
unexpected results.
</p>
<!-- END AUTHORED CONTENT -->
</div>

        <!-- API PAGE -->
        <div class="apiPage">
        <a name="apiReference"></a>
        <h2>API reference: chrome.experimental.webRequest</h2>

          <!-- PROPERTIES -->
          <div class="apiGroup" style="display: none; ">
            <a name="properties"></a>
            <h3 id="properties">Properties</h3>

            <div>
              <a></a>
              <h4>getLastError</h4>
              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span>chrome.extension</span><span>lastError</span>
              </div>
              <div>
              </div>
            </div>

          </div> <!-- /apiGroup -->

          <!-- METHODS -->
          <div id="methodsTemplate" class="apiGroup">
            <a name="global-methods"></a>
            <h3>Methods</h3>

            <!-- iterates over all functions -->
            <div class="apiItem" style="display: none; ">
              <a></a> <!-- method-anchor -->
              <h4>method name</h4>

              <div class="summary"><span>void</span>
                  <!-- Note: intentionally longer 80 columns -->
                  <span>chrome.module.methodName</span>(<span><span>, </span><span></span>
                      <var><span></span></var></span>)</div>

              <div class="description">
                <p class="todo">Undocumented.</p>
                <p>
                  A description from the json schema def of the function goes here.
                </p>

                <!-- PARAMETERS -->
                <h4>Parameters</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- RETURNS -->
                <h4>Returns</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- CALLBACK -->
                <div>
                  <div>
                  <h4>Callback function</h4>
                  <p>
                    The callback <em>parameter</em> should specify a function
                    that looks like this:
                  </p>
                  <p>
                    If you specify the <em>callback</em> parameter, it should
                    specify a function that looks like this:
                  </p>

                  <!-- Note: intentionally longer 80 columns -->
                  <pre>function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>;</pre>
                  <dl>
                    <div>
                      <div>
                      </div>
                    </div>
                  </dl>
                  </div>
                </div>

                <!-- MIN_VERSION -->
                <p>
                  This function was added in version <b><span></span></b>.
                  If you require this function, the manifest key
                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
                  can ensure that your extension won't be run in an earlier browser version.
                </p>
              </div> <!-- /description -->

            </div><div class="apiItem" style="display: none; ">
              <a></a> <!-- method-anchor -->
              <h4>method name</h4>

              <div class="summary"><span>void</span>
                  <!-- Note: intentionally longer 80 columns -->
                  <span>chrome.module.methodName</span>(<span><span>, </span><span></span>
                      <var><span></span></var></span>)</div>

              <div class="description">
                <p class="todo">Undocumented.</p>
                <p>
                  A description from the json schema def of the function goes here.
                </p>

                <!-- PARAMETERS -->
                <h4>Parameters</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- RETURNS -->
                <h4>Returns</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- CALLBACK -->
                <div>
                  <div>
                  <h4>Callback function</h4>
                  <p>
                    The callback <em>parameter</em> should specify a function
                    that looks like this:
                  </p>
                  <p>
                    If you specify the <em>callback</em> parameter, it should
                    specify a function that looks like this:
                  </p>

                  <!-- Note: intentionally longer 80 columns -->
                  <pre>function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>;</pre>
                  <dl>
                    <div>
                      <div>
                      </div>
                    </div>
                  </dl>
                  </div>
                </div>

                <!-- MIN_VERSION -->
                <p>
                  This function was added in version <b><span></span></b>.
                  If you require this function, the manifest key
                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
                  can ensure that your extension won't be run in an earlier browser version.
                </p>
              </div> <!-- /description -->

            </div>  <!-- /apiItem -->

          </div>  <!-- /apiGroup -->

          <!-- EVENTS -->
          <div id="eventsTemplate" class="apiGroup">
            <a name="global-events"></a>
            <h3>Events</h3>
            <!-- iterates over all events -->
            <div class="apiItem">
              <a name="event-onBeforeRedirect"></a>
              <h4>onBeforeRedirect</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onBeforeRedirect</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when a server initiated redirect is about to occur.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The URL of the current request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>statusCode</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>Standard HTTP status code returned by the server.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>redirectUrl</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The new URL.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the browser was about to make the redirect, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onBeforeRequest"></a>
              <h4>onBeforeRequest</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onBeforeRequest</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when a request is about to occur.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request. Request IDs are unique within a browser session. As a result, they could be used to relate different events of the same request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>method</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>Standard HTTP method.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>tabId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the tab in which the request takes place. Set to null if the request isn't related to a tab.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>type</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span>["main_frame", "sub_frame", "stylesheet", "script", "image", "object", "other"]</span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>How the requested resource will be used.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the browser was about to make the request, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onBeforeSendHeaders"></a>
              <h4>onBeforeSendHeaders</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onBeforeSendHeaders</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires before sending an HTTP request, once the request headers are available.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request. Request IDs are unique within a browser session. As a result, they could be used to relate different events of the same request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the browser was about to send headers, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onCompleted"></a>
              <h4>onCompleted</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onCompleted</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when a request is completed.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The URL of the current request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>statusCode</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>Standard HTTP status code returned by the server.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the response was received completely, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onErrorOccurred"></a>
              <h4>onErrorOccurred</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onErrorOccurred</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when an error occurs.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The URL of the current request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>error</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The error description.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the error occurred, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onHeadersReceived"></a>
              <h4>onHeadersReceived</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onHeadersReceived</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when the status line and response headers are received after a request is sent to the server.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>statusCode</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>Standard HTTP status code returned by the server.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the status line and response headers were received, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div><div class="apiItem">
              <a name="event-onRequestSent"></a>
              <h4>onRequestSent</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.experimental.webRequest.</span><span>onRequestSent</span><span class="subdued">.addListener</span>(function(<span>object details</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo" style="display: none; ">Undocumented.</p>
                <p>Fires when a request is sent to the server.</p>

                <!-- PARAMETERS -->
                <div>
                  <h4>Parameters</h4>
                  <dl>
                    <div>
                      <div>
          <dt>
            <var>details</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>requestId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The ID of the request.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>url</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>ip</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The server IP address that is actually connected to. Note that it may be a literal IPv6 address.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>timeStamp</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>number</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>The time when the browser finished sending the request, in milliseconds since the epoch.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
                    </div>
                  </dl>
                </div>
              </div> <!-- /decription -->

            </div> <!-- /apiItem -->

          </div> <!-- /apiGroup -->

          <!-- TYPES -->
          <div class="apiGroup">
            <a name="types"></a>
            <h3 id="types">Types</h3>

            <!-- iterates over all types -->
            <div class="apiItem">
              <a name="type-RequestFilter"></a>
              <h4>RequestFilter</h4>

              <div>
          <dt>
            <var style="display: none; ">paramName</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>An object describing filters to apply to webRequest events.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>urls</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span>
                          array of <span><span>
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span></span>
                        </span>
                        <span style="display: none; ">paramType</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>A list of URLs or URL patterns. Requests that cannot match any of the URLs will be filtered out.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>types</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span>
                          array of <span><span>
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span>["main_frame", "sub_frame", "stylesheet", "script", "image", "object", "other"]</span>
                      </span>
                    </span></span>
                        </span>
                        <span style="display: none; ">paramType</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>A list of request types. Requests that cannot match any of the types will be filtered out.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>tabId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>windowId</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>integer</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd style="display: none; ">
            Description of this parameter from the json schema.
          </dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>

            </div><div class="apiItem">
              <a name="type-BlockingResponse"></a>
              <h4>BlockingResponse</h4>

              <div>
          <dt>
            <var style="display: none; ">paramName</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional" style="display: none; ">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>object</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>Return value for event handlers that have the 'blocking' extraInfoSpec applied. Allows the event handler to modify network requests.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
          <dt>
            <var>cancel</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>boolean</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>If true, the request is cancelled. Used in onBeforeRequest, this prevents the request from being sent.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div><div>
                <div>
          <dt>
            <var>redirectUrl</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum" style="display: none; ">enumerated</span>
                    <span id="typeTemplate">
                      <span style="display: none; ">
                        <a> Type</a>
                      </span>
                      <span>
                        <span style="display: none; ">
                          array of <span><span></span></span>
                        </span>
                        <span>string</span>
                        <span style="display: none; "></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo" style="display: none; ">
            Undocumented.
          </dd>
          <dd>If set, the original request is prevented from being sent and is instead redirected to the given URL.</dd>
          <dd style="display: none; ">
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd style="display: none; ">
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

        </div>
              </div>
            </dl>
          </dd>

          <!-- OBJECT METHODS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- OBJECT EVENT FIELDS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd style="display: none; ">
            <div></div>
          </dd>

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