Video Player: Add null-check on playback error

ui/file_manager/video_player/js/video_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.
 
 'use strict';
 
 /**
  * @param {Element} playerContainer Main container.
  * @param {Element} videoContainer Container for the video element.
  * @param {Element} controlsContainer Container for video controls.
@@ skipping 87 matching lines @@
   // The window is hidden if the video has not loaded yet.
   chrome.app.window.current().show();
 };
 
 /**
  * Handles playback (decoder) errors.
  * @param {MediaError} error Error object.
  * @private
  */
 FullWindowVideoControls.prototype.onPlaybackError_ = function(error) {
-  if (error.target &&
+  if (error.target && error.target.error &&
       error.target.error.code === MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED) {
     this.showErrorMessage('GALLERY_VIDEO_ERROR');
     this.decodeErrorOccured = false;
   } else {
     this.showErrorMessage('GALLERY_VIDEO_DECODING_ERROR');
     this.decodeErrorOccured = true;
   }
 
   // Disable inactivity watcher, and disable the ui, by hiding tools manually.
   this.inactivityWatcher.disabled = true;
@@ skipping 502 matching lines @@
 var initPromise = Promise.all(
     [new Promise(initVideos.wrap(null)),
      new Promise(initStrings.wrap(null)),
      new Promise(util.addPageLoadHandler.wrap(null))]);
 
 initPromise.then(function(results) {
   var videos = results[0];
   player.prepare(videos);
   return new Promise(player.playFirstVideo.wrap(player));
 }.wrap(null));