Update tests for chrome, as MediaStream label, ended attributes and stop() method will be removed

chrome/test/data/extensions/api_test/tab_capture/fullscreen_test.js

 // Copyright 2014 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.
 
 window.addEventListener('load', function() {
   document.body.onclick = function toggleBodyFullscreen() {
     if (document.fullscreenElement || document.webkitFullscreenElement) {
       if (document.exitFullscreen)
         document.exitFullscreen();
       else if (document.webkitExitFullscreen)
@@ skipping 14 matching lines @@
 var mediaStream = null;
 var events = [];
 
 chrome.tabCapture.onStatusChanged.addListener(function(info) {
   if (info.status == 'active') {
     events.push(info.fullscreen);
     if (events.length == 3) {
       chrome.test.assertFalse(events[0]);
       chrome.test.assertTrue(events[1]);
       chrome.test.assertFalse(events[2]);
-      mediaStream.stop();
+      mediaStream.getVideoTracks()[0].stop();
+      mediaStream.getAudioTracks()[0].stop();
       chrome.test.succeed();
     }
 
     if (info.fullscreen)
       chrome.test.sendMessage('entered_fullscreen');
   }
 });
 
 chrome.tabCapture.capture({audio: true, video: true}, function(stream) {
   chrome.test.assertTrue(!!stream);
   mediaStream = stream;
   chrome.test.notifyPass();
   chrome.test.sendMessage('tab_capture_started');
 });