[Chromoting] Enable jscompile for browser tests.

remoting/webapp/browser_test/mock_client_plugin.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
  * Mock implementation of ClientPlugin for testing.
  * @suppress {checkTypes}
  */
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
+ * @param {Element} container
  * @constructor
  * @implements {remoting.ClientPlugin}
  */
 remoting.MockClientPlugin = function(container) {
   this.container_ = container;
   this.element_ = document.createElement('div');
   this.element_.style.backgroundImage = 'linear-gradient(45deg, blue, red)';
   this.width_ = 640;
   this.height_ = 480;
   this.connectionStatusUpdateHandler_ = null;
@@ skipping 101 matching lines @@
 
 remoting.MockClientPlugin.prototype.sendClientMessage =
     function(name, data) {};
 
 remoting.MockClientPlugin.prototype.setOnOutgoingIqHandler =
     function(handler) {};
 
 remoting.MockClientPlugin.prototype.setOnDebugMessageHandler =
     function(handler) {};
 
+/**
+ * @param {function(number, number):void} handler
+ * @private
+ */
 remoting.MockClientPlugin.prototype.setConnectionStatusUpdateHandler =
     function(handler) {
+  /** @type {function(number, number):void} */
   this.connectionStatusUpdateHandler_ = handler;
 };
 
 remoting.MockClientPlugin.prototype.setRouteChangedHandler =
     function(handler) {};
 
 remoting.MockClientPlugin.prototype.setConnectionReadyHandler =
     function(handler) {};
 
 remoting.MockClientPlugin.prototype.setDesktopSizeUpdateHandler =
@@ skipping 25 matching lines @@
  * @extends {remoting.ClientPluginFactory}
  */
 remoting.MockClientPluginFactory = function() {};
 
 remoting.MockClientPluginFactory.prototype.createPlugin =
     function(container, onExtensionMessage) {
   return new remoting.MockClientPlugin(container);
 };
 
 remoting.MockClientPluginFactory.prototype.preloadPlugin = function() {};