Video Player: Support casting a video

ui/file_manager/video_player/js/cast/caster.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';
 
 // This hack prevents a bug on the cast extension.
 // TODO(yoshiki): Remove this once the cast extension supports Chrome apps.
 // Although localStorage in Chrome app is not supported, but it's used in the
 // cast extension. This line prevents an exception on using localStorage.
@@ skipping 65 matching lines @@
                                             onReceiver);
   chrome.cast.initialize(apiConfig, onInitSuccess, onError);
 }
 
 /**
  * @param {chrome.cast.ReceiverAvailability} availability Availability of casts.
  * @param {Array.<Object>} receivers List of casts.
  */
 function onReceiver(availability, receivers) {
   if (availability === chrome.cast.ReceiverAvailability.AVAILABLE) {
+    if (!receivers) {
+      console.error('Receiver list is empty.');
+      receivers = [];
+    }
+
     player.setCastList(receivers);
   } else if (availability == chrome.cast.ReceiverAvailability.UNAVAILABLE) {
     player.setCastList([]);
   } else {
     console.error('Unexpected response in onReceiver.', arguments);
     player.setCastList([]);
   }
 }