Integrate browser tests with new EME player.

chrome/test/data/media/eme_player_js/media_source_utils.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// 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.
 
 // MediaSourceUtils provides basic functionality to load content using MSE API.
 var MediaSourceUtils = new function() {
 }
 
 MediaSourceUtils.loadMediaSourceForTest = function() {
   return this.loadMediaSource(TestConfig.mediaFile, TestConfig.mediaType);
 };
@@ skipping 46 matching lines @@
       srcBuffer.addEventListener('updateend', onUpdateEnd);
       srcBuffer.appendBuffer(new Uint8Array(e.target.response));
     });
     xhr.send();
   }
 
   var mediaSource = new MediaSource();
   mediaSource.addEventListener('sourceopen', onSourceOpen);
   return mediaSource;
 };