Implement aura::Window::CreateCompositorFrameSink()

ui/aura/local/compositor_frame_sink_local.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 UI_AURA_LOCAL_COMPOSITOR_FRAME_SINK_LOCAL_H_
+#define UI_AURA_LOCAL_COMPOSITOR_FRAME_SINK_LOCAL_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "cc/output/compositor_frame_sink.h"
+#include "cc/scheduler/begin_frame_source.h"
+#include "cc/surfaces/compositor_frame_sink_support_client.h"
+#include "cc/surfaces/frame_sink_id.h"
+#include "cc/surfaces/local_surface_id_allocator.h"
+#include "ui/aura/window_port.h"
+#include "ui/base/property_data.h"
+
+namespace cc {
+class CompositorFrameSinkSupport;
+class SurfaceManager;
+}
+
+namespace aura {
+
+class CompositorFrameSinkLocal : public cc::CompositorFrameSink,

[sky, 2017/05/08 22:36:43]

Please add a description to all files. It may be obvious to you what this file
does, but others don't necessarily have the context you do.

[Peng, 2017/05/09 17:26:57]

Done.

+                                 public cc::CompositorFrameSinkSupportClient,
+                                 public cc::ExternalBeginFrameSourceClient {
+ public:
+  CompositorFrameSinkLocal(const cc::FrameSinkId& frame_sink_id,
+                           cc::SurfaceManager* surface_manager);
+  ~CompositorFrameSinkLocal() override;
+
+  using SurfaceChangedCallback =
+      base::Callback<void(const cc::SurfaceId&, const gfx::Size&)>;
+  void SetSurfaceChangedCallback(const SurfaceChangedCallback& callback);
+
+  // cc::CompositorFrameSink:
+  bool BindToClient(cc::CompositorFrameSinkClient* client) override;
+  void DetachFromClient() override;
+  void SubmitCompositorFrame(cc::CompositorFrame frame) override;
+  void EvictFrame() override;
+
+  // cc::CompositorFrameSinkSupportClient:
+  void DidReceiveCompositorFrameAck(
+      const cc::ReturnedResourceArray& resources) 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 {}
+
+  // cc::ExternalBeginFrameSourceClient:
+  void OnNeedsBeginFrames(bool needs_begin_frames) override;
+  void OnDidFinishFrame(const cc::BeginFrameAck& ack) override;
+
+ private:
+  const cc::FrameSinkId frame_sink_id_;
+  std::unique_ptr<cc::CompositorFrameSinkSupport> support_;
+  gfx::Size last_submitted_frame_size_;
+  cc::LocalSurfaceIdAllocator id_allocator_;
+  cc::LocalSurfaceId local_surface_id_;
+  std::unique_ptr<cc::ExternalBeginFrameSource> begin_frame_source_;
+  std::unique_ptr<base::ThreadChecker> thread_checker_;
+  SurfaceChangedCallback surface_changed_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkLocal);
+};
+
+}  // namespace aura
+
+#endif  // UI_AURA_LOCAL_COMPOSITOR_FRAME_SINK_LOCAL_H_