Add test to verify we can cancel the GetUserMedia request right after sending the request

chrome/test/data/webrtc/getusermedia.js

 /**
  * Copyright (c) 2012 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.
  */
 
 /**
  * Keeps track of our local stream (e.g. what our local webcam is streaming).
  * @private
  */
@@ skipping 19 matching lines @@
   }
 
   debug("Requesting webcam and microphone.");
   navigator.webkitGetUserMedia({video: requestVideo, audio: requestAudio},
                                getUserMediaOkCallback,
                                getUserMediaFailedCallback);
   returnToPyAuto('ok-requested');
 }
 
 /**
+ * This function cancel the GetUserMedia request by reloading the web page.
+ */

[phoglund_chromium, 2012/07/04 14:20:58]

I think it makes more sense to call this guy ReloadWebPage. Then write a comment
in the test itself which says "cancel the request by reloading the web page".
Then this function makes a lot more sense on its own since someone could really
call it independent of a getUserMedia request.

[no longer working on chromium, 2012/07/05 14:05:19]

Done.

+function CancelGetUserMediaRequest() {
+  location.reload();
+

[phoglund_chromium, 2012/07/04 14:20:58]

Reloading page

[no longer working on chromium, 2012/07/05 14:05:19]

Done.

+  debug("Cancelling GetUserMedia request.");

[phoglund_chromium, 2012/07/04 14:20:58]

ok-reloaded-page

[no longer working on chromium, 2012/07/05 14:05:19]

Done.

+  returnToPyAuto('ok-calceled-request');
+}
+
+/**
  * Must be called after calling getUserMedia. Returns not-called-yet if we have
  * not yet been called back by WebRTC. Otherwise it returns either ok-got-stream
  * or failed-with-error-x (where x is the error code from the error callback)
  * depending on which callback got called by WebRTC.
  */
 function obtainGetUserMediaResult() {
   returnToPyAuto(gRequestWebcamAndMicrophoneResult);
 }
 
 
@@ skipping 15 matching lines @@
 
 function getUserMediaOkCallback(stream) {
   gLocalStream = stream;
   var streamUrl = webkitURL.createObjectURL(stream);
   document.getElementById("local_view").src = streamUrl;
 
   gRequestWebcamAndMicrophoneResult = 'ok-got-stream';
 }
 
 function getUserMediaFailedCallback(error) {
   gRequestWebcamAndMicrophoneResult = 'failed-with-error-' + error.code;

[phoglund_chromium, 2012/07/04 14:20:58]

Not sure what happened on this line?

[no longer working on chromium, 2012/07/05 14:05:19]

Not sure, it does not change anything in my editor.

-}
+}