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 44 matching lines @@
 }
 
 namespace WebKit {
 class WebStorageEventDispatcher;
 }
 
 namespace v8 {
 class Extension;
 }
 
+namespace webkit_glue {
+class WebThreadImpl;
+}
+
 // 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.
 //
 // TODO(brettw): This has two different and opposing usage patterns which
 // make it confusing. It can be accessed through RenderThread::current(), which
 // can be NULL during tests, or it can be passed as RenderThreadBase, which is
 // mocked during tests. It should be changed to RenderThread::current()
 // everywhere.
 //
@@ skipping 194 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_glue::WebThreadImpl> compositor_thread_;
+
   ObserverList<RenderProcessObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_H_