Video Player: Disables cast feature by default

ui/file_manager/video_player/js/cast/caster.js

Index: ui/file_manager/video_player/js/cast/caster.js
diff --git a/ui/file_manager/video_player/js/cast/caster.js b/ui/file_manager/video_player/js/cast/caster.js
index 7373b066d0c43f314817205bc2d20c6aaed7fefb..ad704497ef039342e30afee962964e0db9bc2b2a 100644
--- a/ui/file_manager/video_player/js/cast/caster.js
+++ b/ui/file_manager/video_player/js/cast/caster.js
@@ -10,18 +10,34 @@
 // 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.