Video Player: Disables cast feature by default

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.
 window.__defineGetter__('localStorage', function() { return {}; });
 
+/**
+ * @type {string}
+ * @const
+ */
+var CAST_COMMAND_LINE_FLAG = 'enable-video-player-chromecast-support';
+
 // THIS IS A TEST APP.
 // TODO(yoshiki): Fix this before launch.
 var APPLICATION_ID = '214CC863';
 
 util.addPageLoadHandler(function() {
+  chrome.commandLinePrivate.hasSwitch(CAST_COMMAND_LINE_FLAG, function(result) {
+    if (result)
+      initialize();
+  }.wrap());
+}.wrap());
+
+/**
+ * Starts initialization of cast-related feature.
+ */
+function initialize() {
   CastExtensionDiscoverer.findInstalledExtension(function(foundId) {
     if (foundId)
       loadCastAPI(initializeApi);
     else
       console.info('No Google Cast extension is installed.');
-  });
-});
+  }.wrap());
+}
 
 /**
  * Executes the given callback after the cast extension is initialized.
  * @param {function} callback Callback (executed asynchronously).
  * @param {boolean=} opt_secondTry Spericy try if it's second call after
  *     installation of Cast API extension.
  */
 function loadCastAPI(callback, opt_secondTry) {
   var script = document.createElement('script');
 
@@ skipping 88 matching lines @@
     }
 
     player.setCastList(receivers);
   } else if (availability == chrome.cast.ReceiverAvailability.UNAVAILABLE) {
     player.setCastList([]);
   } else {
     console.error('Unexpected response in onReceiver.', arguments);
     player.setCastList([]);
   }
 }