Have media content and chrome browser tests load data from media/test/data

media/test/data/eme_player_js/prefixed_widevine_player.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.
 
 // Widevine player responsible for playing media using Widevine key system
 // and prefixed EME API.
 function PrefixedWidevinePlayer(video, testConfig) {
   this.video = video;
   this.testConfig = testConfig;
 }
 
 PrefixedWidevinePlayer.prototype.init = function() {
   PlayerUtils.initPrefixedEMEPlayer(this);
 };
 
 PrefixedWidevinePlayer.prototype.registerEventListeners = function() {
   PlayerUtils.registerPrefixedEMEEventListeners(this);
 };
 
+PrefixedWidevinePlayer.prototype.registerEventListeners = function(video) {
+  RegisterPrefixedEMEEventListeners(this, video);
+};
+
 PrefixedWidevinePlayer.prototype.onWebkitKeyMessage = function(message) {
   function onSuccess(response) {
     var key = new Uint8Array(response);
     Utils.timeLog('Adding key to sessionID: ' + message.sessionId, key);
     message.target.webkitAddKey(this.testConfig.keySystem,
                                 key,
                                 new Uint8Array(1),
                                 message.sessionId);
   }
   Utils.sendRequest('POST', 'arraybuffer', message.message,
                     this.testConfig.licenseServerURL, onSuccess,
                     this.testConfig.forceInvalidResponse);
 };