Decouple GpuCompositorFrameSink from DisplayCompositor

services/ui/surfaces/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 SERVICES_UI_SURFACES_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_
 #define SERVICES_UI_SURFACES_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_
 
 #include "services/ui/surfaces/gpu_compositor_frame_sink.h"
 
 namespace ui {
 
 class GpuOffscreenCompositorFrameSink : public GpuCompositorFrameSink {
  public:
   GpuOffscreenCompositorFrameSink(
-      DisplayCompositor* display_compositor,
+      cc::CompositorFrameSinkDelegate* 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 ui
 
 #endif  // SERVICES_UI_SURFACES_GPU_OFFSCREEN_COMPOSITOR_FRAME_SINK_H_