Interfaceify ClientPlugin in preparation for mocking it.

remoting/webapp/remoting.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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @type {remoting.HostSession} */ remoting.hostSession = null;
@@ skipping 34 matching lines @@
     var htmlNode = /** @type {HTMLElement} */ (document.body.parentNode);
     htmlNode.classList.add('apps-v2');
   } else {
     migrateLocalToChromeStorage_();
   }
 
   console.log(remoting.getExtensionInfo());
   l10n.localize();
 
   // Create global objects.
+  remoting.ClientPlugin.factory = new remoting.DefaultClientPluginFactory();
+  remoting.SessionConnector.factory =
+      new remoting.DefaultSessionConnectorFactory();
   remoting.settings = new remoting.Settings();
   if (base.isAppsV2()) {
     remoting.identity = new remoting.Identity(consentRequired_);
     remoting.fullscreen = new remoting.FullscreenAppsV2();
     remoting.windowFrame = new remoting.WindowFrame(
         document.getElementById('title-bar'));
   } else {
     remoting.oauth2 = new remoting.OAuth2();
     if (!remoting.oauth2.isAuthenticated()) {
       document.getElementById('auth-dialog').hidden = false;
@@ skipping 123 matching lines @@
   }
 
   remoting.testEvents = new base.EventSource();
 
   /** @enum {string} */
   remoting.testEvents.Names = {
     uiModeChanged: 'uiModeChanged'
   };
   remoting.testEvents.defineEvents(base.values(remoting.testEvents.Names));
 
-  remoting.ClientPlugin.preload();
+  remoting.ClientPlugin.factory.preloadPlugin();
 };
 
 /**
  * Returns whether or not IT2Me is supported via the host NPAPI plugin.
  *
  * @return {boolean}
  */
 function isIT2MeSupported_() {
   // Currently, IT2Me on Chromebooks is not supported.
   return !remoting.runningOnChromeOS();
@@ skipping 375 matching lines @@
 }
 
 /**
  * Tests whether we are running on ChromeOS.
  *
  * @return {boolean} True if the platform is ChromeOS.
  */
 remoting.platformIsChromeOS = function() {
   return navigator.userAgent.match(/\bCrOS\b/) != null;
 }