[Webapp Refactor] Re-add remoting.ConnectionStats.

remoting/webapp/app_remoting/js/application_context_menu.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
  * Class representing the application's context menu.
  */
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
  * @param {remoting.ContextMenuAdapter} adapter
+ * @param {remoting.ClientPlugin} plugin
  * @constructor
+ * @implements {base.Disposable}
  */
-remoting.ApplicationContextMenu = function(adapter) {
+remoting.ApplicationContextMenu = function(adapter, plugin) {
   /** @private {remoting.ContextMenuAdapter} */
   this.adapter_ = adapter;
 
   this.adapter_.create(
       remoting.ApplicationContextMenu.kSendFeedbackId,
       l10n.getTranslationOrError(/*i18n-content*/'SEND_FEEDBACK'),
       false);
   this.adapter_.create(
       remoting.ApplicationContextMenu.kShowStatsId,
       l10n.getTranslationOrError(/*i18n-content*/'SHOW_STATS'),
       true);
+
+  // TODO(kelvinp):Unhook this event on shutdown.
   this.adapter_.addListener(this.onClicked_.bind(this));
 
   /** @private {string} */
   this.hostId_ = '';
+
+  /** @private */
+  this.stats_ = new remoting.ConnectionStats(
+      document.getElementById('statistics'), plugin);
+};
+
+remoting.ApplicationContextMenu.prototype.dispose = function() {
+  base.dispose(this.stats_);
+  this.stats_ = null;
 };
 
 /**
  * @param {string} hostId
  */
 remoting.ApplicationContextMenu.prototype.setHostId = function(hostId) {
   this.hostId_ = hostId;
-}
+};
 
 /**
  * Add an indication of the connection RTT to the 'Show statistics' menu item.
  *
  * @param {number} rttMs The RTT of the connection, in ms.
  */
 remoting.ApplicationContextMenu.prototype.updateConnectionRTT =
     function(rttMs) {
   var rttText =
       rttMs < 50  ? /*i18n-content*/'CONNECTION_QUALITY_GOOD' :
@@ skipping 21 matching lines @@
 
       /** @type {remoting.ApplicationContextMenu} */
       var that = this;
 
       /** @param {AppWindow} consentWindow */
       var onCreate = function(consentWindow) {
         var onLoad = function() {
           var message = {
             method: 'init',
             hostId: that.hostId_,
-            connectionStats: JSON.stringify(remoting.stats.mostRecent())
+            connectionStats: JSON.stringify(that.stats_.mostRecent())
           };
           consentWindow.contentWindow.postMessage(message, '*');
         };
         consentWindow.contentWindow.addEventListener('load', onLoad, false);
       };
       chrome.app.window.create(
           'feedback_consent.html', windowAttributes, onCreate);
       break;
 
     case remoting.ApplicationContextMenu.kShowStatsId:
-      if (remoting.stats) {
-        remoting.stats.show(info.checked);
-      }
+      this.stats_.show(info.checked);
       break;
   }
 };
 
 
 /** @type {string} */
 remoting.ApplicationContextMenu.kSendFeedbackId = 'send-feedback';
 
 /** @type {string} */
 remoting.ApplicationContextMenu.kShowStatsId = 'show-stats';