DirectCompositorFrameSink Uses CompositorFrameSinkSupport

services/ui/surfaces/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 SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_
 #define SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 62 matching lines @@
   void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface() override;
 
   void OnClientConnectionLost();
   void OnPrivateConnectionLost();
 
   DisplayCompositor* const display_compositor_;
 
+  // GpuCompositorFrameSink holds a Display and its BeginFrameSource if it
+  // created with non-null gpu::SurfaceHandle. In the window server, the display
+  // root window's CompositorFrameSink will have a valid gpu::SurfaceHandle.
+  std::unique_ptr<cc::Display> display_;
+  std::unique_ptr<cc::BeginFrameSource> display_begin_frame_source_;
   cc::CompositorFrameSinkSupport support_;
 
   // Track the surface references for the surface corresponding to this
   // compositor frame sink.
   cc::ReferencedSurfaceTracker surface_tracker_;
 
   bool client_connection_lost_ = false;
   bool private_connection_lost_ = false;
 
   cc::mojom::MojoCompositorFrameSinkClientPtr client_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSink> binding_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkPrivate>
       compositor_frame_sink_private_binding_;
   mojo::Binding<cc::mojom::DisplayPrivate> display_private_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCompositorFrameSink);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_SURFACES_GPU_COMPOSITOR_FRAME_SINK_H_