Split GpuProcessHost into GpuProcessHostUIShim, which runs on the UI...

chrome/browser/renderer_host/backing_store_proxy.h

 // Copyright (c) 2010 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 CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_PROXY_H_
 #define CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_PROXY_H_
 
 #include "base/basictypes.h"
 #include "chrome/browser/renderer_host/backing_store.h"
 #include "ipc/ipc_channel.h"
 
-class GpuProcessHost;
+class GpuProcessHostUIShim;
 
 class BackingStoreProxy : public BackingStore,
                           public IPC::Channel::Listener {
  public:
   BackingStoreProxy(RenderWidgetHost* widget, const gfx::Size& size,
-                    GpuProcessHost* process, int32 routing_id);
+                    GpuProcessHostUIShim* process_shim, int32 routing_id);
   virtual ~BackingStoreProxy();
 
   // BackingStore implementation.
   virtual void PaintToBackingStore(RenderProcessHost* process,
                                    TransportDIB::Id bitmap,
                                    const gfx::Rect& bitmap_rect,
                                    const std::vector<gfx::Rect>& copy_rects,
                                    bool* painted_synchronously);
   virtual bool CopyFromBackingStore(const gfx::Rect& rect,
                                     skia::PlatformCanvas* output);
   virtual void ScrollBackingStore(int dx, int dy,
                                   const gfx::Rect& clip_rect,
                                   const gfx::Size& view_size);
 
   // IPC::Channel::Listener implementation.
   virtual void OnMessageReceived(const IPC::Message& message);
   virtual void OnChannelConnected(int32 peer_pid);
   virtual void OnChannelError();
 
  private:
   // Message handlers.
   void OnPaintToBackingStoreACK();
 
-  GpuProcessHost* process_;
+  GpuProcessHostUIShim* process_shim_;
   int32 routing_id_;
 
   // Set to true when we're waiting for the GPU process to do a paint and send
   // back a "done" message. In this case, the renderer will be waiting for our
   // message that we're done using the backing store.
   bool waiting_for_paint_ack_;
 
   DISALLOW_COPY_AND_ASSIGN(BackingStoreProxy);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_PROXY_H_