Mus+Ash: Unified BeginFrame Skeleton

services/ui/public/cpp/window_compositor_frame_sink.h

 // Copyright 2014 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_PUBLIC_CPP_WINDOW_COMPOSITOR_FRAME_SINK_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_COMPOSITOR_FRAME_SINK_H_
 
 #include "base/macros.h"
 #include "cc/ipc/mojo_compositor_frame_sink.mojom.h"
 #include "cc/output/compositor_frame_sink.h"
 #include "cc/output/context_provider.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/surfaces/surface_id.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace gpu {
 class GpuChannelHost;
 }
 
 namespace ui {
 
 class WindowCompositorFrameSinkBinding;
 
 class WindowCompositorFrameSink
     : public cc::CompositorFrameSink,
-      public cc::mojom::MojoCompositorFrameSinkClient {
+      public cc::mojom::MojoCompositorFrameSinkClient,
+      public cc::ExternalBeginFrameSourceClient {
  public:
   // static
   static std::unique_ptr<WindowCompositorFrameSink> Create(
       scoped_refptr<cc::ContextProvider> context_provider,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       std::unique_ptr<WindowCompositorFrameSinkBinding>*
           compositor_frame_sink_binding);
 
   ~WindowCompositorFrameSink() override;
 
   // cc::CompositorFrameSink implementation.
   bool BindToClient(cc::CompositorFrameSinkClient* client) override;
   void DetachFromClient() override;
   void SubmitCompositorFrame(cc::CompositorFrame frame) override;
 
  private:
   friend class Window;
 
   WindowCompositorFrameSink(
       scoped_refptr<cc::ContextProvider> context_provider,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
       mojo::InterfacePtrInfo<cc::mojom::MojoCompositorFrameSink>
           compositor_frame_sink_info,
       cc::mojom::MojoCompositorFrameSinkClientRequest client_request);
 
   // cc::mojom::MojoCompositorFrameSinkClient implementation:
   void DidReceiveCompositorFrameAck() override;
+  void OnBeginFrame(const cc::BeginFrameArgs& begin_frame_args) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
 
-  std::unique_ptr<cc::BeginFrameSource> begin_frame_source_;
+  // cc::ExternalBeginFrameSourceClient implementation.
+  void OnNeedsBeginFrames(bool needs_begin_frames) override;
+
+  std::unique_ptr<cc::ExternalBeginFrameSource> begin_frame_source_;
   mojo::InterfacePtrInfo<cc::mojom::MojoCompositorFrameSink>
       compositor_frame_sink_info_;
   mojo::InterfaceRequest<cc::mojom::MojoCompositorFrameSinkClient>
       client_request_;
   cc::mojom::MojoCompositorFrameSinkPtr compositor_frame_sink_;
   std::unique_ptr<mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient>>
       client_binding_;
   std::unique_ptr<base::ThreadChecker> thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowCompositorFrameSink);
@@ skipping 20 matching lines @@
 
   cc::mojom::MojoCompositorFrameSinkRequest compositor_frame_sink_request_;
   mojo::InterfacePtrInfo<cc::mojom::MojoCompositorFrameSinkClient>
       compositor_frame_sink_client_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowCompositorFrameSinkBinding);
 };
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_COMPOSITOR_FRAME_SINK_H_