Prepare Chromium for WebCompositor::initialize.

content/renderer/gpu/compositor_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_GPU_COMPOSITOR_THREAD_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_THREAD_H_
 
 #include <map>
 
 #include "base/memory/linked_ptr.h"
@@ skipping 16 matching lines @@
   explicit CompositorThread(IPC::Channel::Listener* main_listener);
   ~CompositorThread();
 
   // This MessageFilter should be added to allow input events to be redirected
   // to the compositor's thread.
   IPC::ChannelProxy::MessageFilter* GetMessageFilter() const;
 
   // Callable from the main thread or the compositor's thread.
   void AddCompositor(int routing_id, int compositor_id);
 
+  webkit_glue::WebThreadImpl* GetWebThread() const { return thread_.get(); }

[sky, 2011/11/18 23:27:30]

nit: according to style guide this should be named thread().

+
  private:
   // Callback only from the compositor's thread.
   void RemoveCompositor(int routing_id);
 
   // Called from the compositor's thread.
   void HandleInputEvent(int routing_id,
                         const WebKit::WebInputEvent* input_event);
 
   class CompositorWrapper;
   friend class CompositorWrapper;
 
   typedef std::map<int,  // routing_id
                    linked_ptr<CompositorWrapper> > CompositorMap;
   CompositorMap compositors_;
 
   webkit_glue::WebThreadImpl thread_;
   scoped_refptr<InputEventFilter> filter_;
 };
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_THREAD_H_