Revert 282795 "Have media content and chrome browser tests load ..."

trunk/src/content/test/data/media/media_source_utils.js

 // Copyright (c) 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.
 
 function loadMediaFromURL(video) {
   installTitleEventHandler(video, 'error');
   video.addEventListener('playing', function(event) {
     console.log('Video Playing.');
   });
   var source = loadMediaSource(QueryString.mediafile, QueryString.mediatype);
@@ skipping 47 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;
 }