Add a menu option for the right-hand Ctrl -> Meta mapping.

remoting/webapp/crd/js/window_frame.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.
 
 /**
  * @fileoverview
  * Apps v2 custom title bar implementation
  */
 
 'use strict';
@@ skipping 65 matching lines @@
       this.showWindowControlsPreview_.bind(this));
 };
 
 /**
  * @return {remoting.OptionsMenu}
  */
 remoting.WindowFrame.prototype.createOptionsMenu = function() {
   return new remoting.OptionsMenu(
       this.titleBar_.querySelector('.menu-send-ctrl-alt-del'),
       this.titleBar_.querySelector('.menu-send-print-screen'),
+      this.titleBar_.querySelector('.menu-map-right-ctrl-to-meta'),
       this.titleBar_.querySelector('.menu-resize-to-client'),
       this.titleBar_.querySelector('.menu-shrink-to-fit'),
       this.titleBar_.querySelector('.menu-new-connection'),
       this.titleBar_.querySelector('.window-fullscreen'),
       this.titleBar_.querySelector('.menu-toggle-connection-stats'),
       this.titleBar_.querySelector('.menu-start-stop-recording'));
 };
 
 /**
  * @param {remoting.DesktopConnectedView} desktopConnectedView The view for the
@@ skipping 119 matching lines @@
   var hidePreview = function() {
     target.classList.remove('preview');
   };
   target.classList.add('preview');
   window.setTimeout(hidePreview, kPreviewTimeoutMs);
 };
 
 
 /** @type {remoting.WindowFrame} */
 remoting.windowFrame = null;