Enable MediaSource rendering in chromoting client with Chrome 37.

remoting/webapp/client_session.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.
 
 /**
  * @fileoverview
  * Class handling creation and teardown of a remoting client session.
  *
  * The ClientSession class controls lifetime of the client plugin
  * object and provides the plugin with the functionality it needs to
@@ skipping 487 matching lines @@
   } else if (this.mode_ != remoting.ClientSession.Mode.ME2ME) {
     var sendCadElement = document.getElementById('send-ctrl-alt-del');
     sendCadElement.hidden = true;
   }
 
   // Apply customized key remappings if the plugin supports remapKeys.
   if (this.plugin_.hasFeature(remoting.ClientPlugin.Feature.REMAP_KEY)) {
     this.applyRemapKeys_(true);
   }
 
-  // Enable MediaSource-based rendering if available.
-  if (remoting.settings.USE_MEDIA_SOURCE_RENDERING &&
+
+  // Enable MediaSource-based rendering on Chrome 37 and above.
+  var chromeVersionMajor =
+      parseInt((remoting.getChromeVersion() || '0').split('.')[0], 10);
+  if (chromeVersionMajor >= 37 &&
       this.plugin_.hasFeature(
           remoting.ClientPlugin.Feature.MEDIA_SOURCE_RENDERING)) {
     this.video_ = /** @type {HTMLMediaElement} */(
         document.getElementById('mediasource-video-output'));
     // Make sure that the <video> element is hidden until we get the first
     // frame.
     this.video_.style.width = '0px';
     this.video_.style.height = '0px';
 
     var renderer = new remoting.MediaSourceRenderer(this.video_);
@@ skipping 987 matching lines @@
  * @return {{width: number, height: number}} The height of the window's client
  *     area. This differs between apps v1 and apps v2 due to the custom window
  *     borders used by the latter.
  * @private
  */
 remoting.ClientSession.prototype.getClientArea_ = function() {
   return remoting.windowFrame ?
       remoting.windowFrame.getClientArea() :
       { 'width': window.innerWidth, 'height': window.innerHeight };
 }