chrome/test/data/extensions/api_test/desktop_capture_delegate/example.com.html

<!--
Copyright 2013 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<script>

var extensionId = "knldjmfmopnpolahpmmgbagdohdnhkik";

function sendToBrowser(msg) {
  domAutomationController.send(msg);
}

function requestStreamId(callback) {
  function onResponse(response) {
    if (chrome.runtime.lastError) {
      sendToBrowser(false);
      return;
    }
    id = response["id"];
    callback(id);
  };

  chrome.runtime.sendMessage(
      extensionId, ["getStream"], onResponse);
}

function getStream() {
  function onStreamId(id) {
    if (!id) {
      sendToBrowser(false);
      return;
    }
    navigator.webkitGetUserMedia({
      audio:false,
      video: { mandatory: { chromeMediaSource: "desktop",
                            chromeMediaSourceId: id } }
    }, sendToBrowser.bind(null, true), sendToBrowser.bind(null, false));
  };
  requestStreamId(onStreamId);
}

function getStreamWithInvalidId() {
  function onStreamId(id) {
    if (!id) {
      sendToBrowser(false);
      return;
    }
    navigator.webkitGetUserMedia({
      audio:false,
      video: { mandatory: { chromeMediaSource: "desktop",
                            chromeMediaSourceId: id + "x" } }
    }, sendToBrowser.bind(null, false), sendToBrowser.bind(null, true));
  };
  requestStreamId(onStreamId);
}

function openPickerDialogAndReturn() {
  chrome.runtime.sendMessage(
      extensionId, ["getStreamNoWait"], function(message) {
        // Once the picker is shown request to close the tab. The picker should
        // be destroyed as result.
        sendToBrowser(true);
      });
}

</script>