[NOT FOR COMMIT] Hacks to merge render compositor thread with UI thread

content/renderer/gpu/compositor_thread.h

Index: content/renderer/gpu/compositor_thread.h
diff --git a/content/renderer/gpu/compositor_thread.h b/content/renderer/gpu/compositor_thread.h
index e0bc9f319a6a0e3bb286be919e8163feb9496e06..2c4f833a5e68d131c49e55716d5aca42359da3bf 100644
--- a/content/renderer/gpu/compositor_thread.h
+++ b/content/renderer/gpu/compositor_thread.h
@@ -28,7 +28,8 @@ class CompositorThread {
  public:
   // |main_listener| refers to the central IPC message listener that lives on
   // the main thread, where all incoming IPC messages are first handled.
-  explicit CompositorThread(IPC::Listener* main_listener);
+  explicit CompositorThread(IPC::Listener* main_listener,
+                            MessageLoop* message_loop);
   ~CompositorThread();
 
   // This MessageFilter should be added to allow input events to be redirected
@@ -40,9 +41,9 @@ class CompositorThread {
                        int input_handler_id,
                        const base::WeakPtr<RenderViewImpl>& render_view_impl);
 
-  webkit_glue::WebThreadImpl* GetWebThread() { return &thread_; }
+  webkit_glue::WebThreadImplForMessageLoop* GetWebThread() { return &thread_; }
 
-  MessageLoop* message_loop() { return thread_.message_loop(); }
+  MessageLoop* message_loop() { return message_loop_; }
 
  private:
   // Callback only from the compositor's thread.
@@ -66,7 +67,8 @@ class CompositorThread {
                    scoped_refptr<InputHandlerWrapper> > InputHandlerMap;
   InputHandlerMap input_handlers_;
 
-  webkit_glue::WebThreadImpl thread_;
+  MessageLoop* message_loop_;
+  webkit_glue::WebThreadImplForMessageLoop thread_;
   scoped_refptr<InputEventFilter> filter_;
 };