[Chromoting] Move ownership of ClientPlugin into SessionConnector.

remoting/webapp/browser_test/mock_session_connector.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 SessionConnector for testing.
  * @suppress {checkTypes}
  */
 
@@ skipping 131 matching lines @@
   /** @param {remoting.ClientSession.StateEvent} event */
   var onStateChange = function(event) {
     if (event.current == remoting.ClientSession.State.CONNECTED) {
       that.onConnected_(clientSession);
     }
   };
 
   clientSession.addEventListener(
       remoting.ClientSession.Events.stateChanged,
       onStateChange);
-  clientSession.createPluginAndConnect(this.onExtensionMessage_);
 };
 
 
 /**
  * @constructor
  * @extends {remoting.SessionConnectorFactory}
  */
 remoting.MockSessionConnectorFactory = function() {};
 
 /**
@@ skipping 12 matching lines @@
  *     in the client session.
  * @return {remoting.MockSessionConnector}
  */
 remoting.MockSessionConnectorFactory.prototype.createConnector =
     function(clientContainer, onConnected, onError, onExtensionMessage,
              onConnectionFailed, requiredCapabilities, defaultRemapKeys) {
   return new remoting.MockSessionConnector(
       clientContainer, onConnected, onError, onExtensionMessage,
       onConnectionFailed, requiredCapabilities, defaultRemapKeys);
 };