Implement temporary reference assignment with DisplayCompositor.

components/display_compositor/gpu_compositor_frame_sink.h

 // Copyright 2015 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_COMPOSITOR_FRAME_SINK_H_
 #define COMPONENTS_DISPLAY_COMPOSITOR_GPU_COMPOSITOR_FRAME_SINK_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/ipc/display_compositor.mojom.h"
 #include "cc/ipc/mojo_compositor_frame_sink.mojom.h"
 #include "cc/surfaces/compositor_frame_sink_support.h"
 #include "cc/surfaces/compositor_frame_sink_support_client.h"
+#include "cc/surfaces/local_surface_id.h"
+#include "cc/surfaces/surface_id.h"
 #include "components/display_compositor/display_compositor_export.h"
 #include "components/display_compositor/gpu_compositor_frame_sink_delegate.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace display_compositor {
 
 // Server side representation of a WindowSurface.
 class DISPLAY_COMPOSITOR_EXPORT GpuCompositorFrameSink
     : public NON_EXPORTED_BASE(cc::CompositorFrameSinkSupportClient),
       public NON_EXPORTED_BASE(cc::mojom::MojoCompositorFrameSink),
       public NON_EXPORTED_BASE(cc::mojom::MojoCompositorFrameSinkPrivate) {
  public:
   GpuCompositorFrameSink(
       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);
 
   ~GpuCompositorFrameSink() override;
 
   // cc::mojom::MojoCompositorFrameSink:
   void EvictFrame() override;
   void SetNeedsBeginFrame(bool needs_begin_frame) override;
   void SubmitCompositorFrame(const cc::LocalSurfaceId& local_surface_id,
                              cc::CompositorFrame frame) override;
 
   // cc::mojom::MojoCompositorFrameSinkPrivate:
+  void ClaimTemporaryReference(const cc::SurfaceId& surface_id) override;
   void RequestCopyOfSurface(
       std::unique_ptr<cc::CopyOutputRequest> request) override;
 
  private:
   // cc::CompositorFrameSinkSupportClient implementation:
   void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface(const cc::LocalSurfaceId& local_surface_id,
                        const gfx::Rect& damage_rect) override;
@@ skipping 12 matching lines @@
       compositor_frame_sink_binding_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkPrivate>
       compositor_frame_sink_private_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCompositorFrameSink);
 };
 
 }  // namespace display_compositor
 
 #endif  // COMPONENTS_DISPLAY_COMPOSITOR_GPU_COMPOSITOR_FRAME_SINK_H_