Initialize and set compositor thread in WebKit initialization

content/renderer/render_thread.h

 // Copyright (c) 2011 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 CONTENT_RENDERER_RENDER_THREAD_H_
 #define CONTENT_RENDERER_RENDER_THREAD_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 38 matching lines @@
 class MessageLoopProxy;
 class Thread;
 }
 
 namespace IPC {
 struct ChannelHandle;
 }
 
 namespace WebKit {
 class WebStorageEventDispatcher;
+class WebThread;
 }
 
 namespace v8 {
 class Extension;
 }
 
 // The RenderThreadBase is the minimal interface that a RenderView/Widget
 // expects from a render thread. The interface basically abstracts a way to send
 // and receive messages.
 //
@@ skipping 200 matching lines @@
 
   // The channel from the renderer process to the GPU process.
   scoped_refptr<GpuChannelHost> gpu_channel_;
 
   // A lazily initiated thread on which file operations are run.
   scoped_ptr<base::Thread> file_thread_;
 
   // Map of registered v8 extensions. The key is the extension name.
   std::set<std::string> v8_extensions_;
 
+  scoped_ptr<WebKit::WebThread> compositor_thread_;
+
   ObserverList<RenderProcessObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_H_