WIP: move OffscreenCanvas into new display compositor

components/display_compositor/gpu_offscreen_compositor_frame_sink.h

 // Copyright 2017 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 COMPONENTS_DISPLAY_COMPOSITOR_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_
 #define COMPONENTS_DISPLAY_COMPOSITOR_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_
 
 #include "components/display_compositor/display_compositor_export.h"
-#include "components/display_compositor/gpu_compositor_frame_sink.h"
+#include "components/display_compositor/gpu_compositor_frame_sink_base.h"
 #include "components/display_compositor/gpu_compositor_frame_sink_delegate.h"
 
 namespace display_compositor {
 
 class DISPLAY_COMPOSITOR_EXPORT GpuOffscreenCompositorFrameSink
-    : public GpuCompositorFrameSink {
+    : public GpuCompositorFrameSinkBase {
  public:
   GpuOffscreenCompositorFrameSink(
       GpuCompositorFrameSinkDelegate* delegate,
       cc::SurfaceManager* surface_manager,
       const cc::FrameSinkId& frame_sink_id,
       cc::mojom::MojoCompositorFrameSinkRequest request,
       cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
       cc::mojom::MojoCompositorFrameSinkClientPtr client);
 
   ~GpuOffscreenCompositorFrameSink() override;
 
  private:
   mojo::Binding<cc::mojom::MojoCompositorFrameSink> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuOffscreenCompositorFrameSink);
 };
 
 }  // namespace display_compositor
 
 #endif  // COMPONENTS_DISPLAY_COMPOSITOR_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_