Implement aura::WindowPortMus::CreateCompositorFrameSink()

components/viz/client/client_compositor_frame_sink.h

Index: components/viz/client/client_compositor_frame_sink.h
diff --git a/components/viz/client/client_compositor_frame_sink.h b/components/viz/client/client_compositor_frame_sink.h
index 407aa4130c4cf8850a37d536a3970c328a63f805..62c84dead044188df1c50800ae1560a7f2f81db5 100644
--- a/components/viz/client/client_compositor_frame_sink.h
+++ b/components/viz/client/client_compositor_frame_sink.h
@@ -21,15 +21,24 @@ class ClientCompositorFrameSink
       public cc::mojom::MojoCompositorFrameSinkClient,
       public cc::ExternalBeginFrameSourceClient {
  public:
+  // If |generate_local_surface_id| is true, a local surface id will be
+  // generated for a new frame with different size, otherwise the
+  // |SetLocalSurfaceId| should be used for providing a valid local surface
+  // id.
   ClientCompositorFrameSink(
       scoped_refptr<cc::ContextProvider> context_provider,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       cc::mojom::MojoCompositorFrameSinkPtrInfo compositor_frame_sink_info,
       cc::mojom::MojoCompositorFrameSinkClientRequest client_request,
-      bool enable_surface_synchronization);
+      bool generate_local_surface_id);
 
   ~ClientCompositorFrameSink() override;
 
+  using SurfaceChangedCallback =
+      base::Callback<void(const cc::LocalSurfaceId&, const gfx::Size&)>;
+  // Set a callback which will be called when the surface is changed.
+  void SetSurfaceChangedCallback(const SurfaceChangedCallback& callback);
+
   // cc::CompositorFrameSink implementation.
   bool BindToClient(cc::CompositorFrameSinkClient* client) override;
   void DetachFromClient() override;
@@ -57,7 +66,9 @@ class ClientCompositorFrameSink
   std::unique_ptr<mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient>>
       client_binding_;
   THREAD_CHECKER(thread_checker_);
-  const bool enable_surface_synchronization_;
+  const bool generate_local_surface_id_;
+
+  SurfaceChangedCallback surface_changed_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientCompositorFrameSink);
 };