Use SingleThreadTaskRunner instead of MessageLoopProxy in remoting/host.

remoting/host/plugin/host_script_object.h

 // 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.
 
 #ifndef REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_
 #define REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 272 matching lines @@
 
   base::Lock access_code_lock_;
   std::string access_code_;
   base::TimeDelta access_code_lifetime_;
 
   std::string client_username_;
   ScopedRefNPObject log_debug_info_func_;
   ScopedRefNPObject on_nat_traversal_policy_changed_func_;
   ScopedRefNPObject on_state_changed_func_;
   base::PlatformThreadId np_thread_id_;
-  scoped_refptr<PluginMessageLoopProxy> plugin_message_loop_proxy_;
+  scoped_refptr<PluginMessageLoopProxy> plugin_task_runner_;
 
   scoped_ptr<ChromotingHostContext> host_context_;
   HostKeyPair host_key_pair_;
   scoped_ptr<SignalStrategy> signal_strategy_;
   scoped_ptr<RegisterSupportHostRequest> register_request_;
   scoped_ptr<LogToServer> log_to_server_;
   scoped_ptr<DesktopEnvironment> desktop_environment_;
   scoped_ptr<It2MeHostUserInterface> it2me_host_user_interface_;
 
   scoped_refptr<ChromotingHost> host_;
@@ skipping 30 matching lines @@
   // SequencedWorkerPool. Problem is that SequencedWorkerPool relies
   // on MessageLoopProxy::current().
   base::Thread worker_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(HostNPScriptObject);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_PLUGIN_HOST_SCRIPT_OBJECT_H_