Show MessageWindow from the background page

remoting/webapp/js_proto/chrome_proto.js

 // Copyright (c) 2012 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.
 
 // This file contains various hacks needed to inform JSCompiler of various
 // WebKit- and Chrome-specific properties and methods. It is used only with
 // JSCompiler to verify the type-correctness of our code.
 
 /** @type {Object} */
 var chrome = {};
@@ skipping 314 matching lines @@
   this.state = '';
   /** @type {string} */
   this.type = '';
 };
 
 /** @constructor */
 var AppWindow = function() {
   /** @type {Window} */
   this.contentWindow = null;
   /** @type {chrome.Event} */
+  this.onClosed = null;
+  /** @type {chrome.Event} */
   this.onRestored = null;
   /** @type {chrome.Event} */
   this.onMaximized = null;
   /** @type {chrome.Event} */
   this.onFullscreened = null;
   /** @type {string} */
   this.id = '';
 };
 
 AppWindow.prototype.close = function() {};
 AppWindow.prototype.drawAttention = function() {};
 AppWindow.prototype.maximize = function() {};
 AppWindow.prototype.minimize = function() {};
 AppWindow.prototype.restore = function() {};
+AppWindow.prototype.show = function() {};
 AppWindow.prototype.fullscreen = function() {};
 /** @return {boolean} */
 AppWindow.prototype.isFullscreen = function() {};
 /** @return {boolean} */
 AppWindow.prototype.isMaximized = function() {};
 
 /**
  * @param {{rects: Array.<ClientRect>}} rects
  */
 AppWindow.prototype.setShape = function(rects) {};
@@ skipping 142 matching lines @@
 chrome.cast.initialize =
     function(apiConfig, onInitSuccess, onInitError) {};
 
 /**
  * @param {function(chrome.cast.Session):void} successCallback
  * @param {function(chrome.cast.Error):void} errorCallback
  */
 chrome.cast.requestSession =
     function(successCallback, errorCallback) {};