Delay UpdateRect until the SwapBuffers callback when accelerated compositing is on.

content/common/gpu/image_transport_surface.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_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 #define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 138 matching lines @@
   PassThroughImageTransportSurface(GpuChannelManager* manager,
                                    int32 render_view_id,
                                    int32 renderer_id,
                                    int32 command_buffer_id,
                                    gfx::GLSurface* surface);
   virtual ~PassThroughImageTransportSurface();
 
   // GLSurface implementation.
   virtual bool Initialize() OVERRIDE;
   virtual void Destroy() OVERRIDE;
+  virtual bool SwapBuffers() OVERRIDE;
+  virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
 
   // ImageTransportSurface implementation.
   virtual void OnNewSurfaceACK(
       uint64 surface_id, TransportDIB::Handle surface_handle) OVERRIDE;
   virtual void OnBuffersSwappedACK() OVERRIDE;
   virtual void OnPostSubBufferACK() OVERRIDE;
   virtual void OnResizeViewACK() OVERRIDE;
   virtual void OnResize(gfx::Size size) OVERRIDE;
 
  private:
   scoped_ptr<ImageTransportHelper> helper_;
 
   DISALLOW_COPY_AND_ASSIGN(PassThroughImageTransportSurface);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_H_