cc: Introduce BeginFrame sequence numbers and acknowledgements.

content/browser/renderer_host/compositor_impl_android.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 35 matching lines @@
 // -----------------------------------------------------------------------------
 // Browser-side compositor that manages a tree of content and UI layers.
 // -----------------------------------------------------------------------------
 class CONTENT_EXPORT CompositorImpl
     : public Compositor,
       public cc::LayerTreeHostClient,
       public cc::LayerTreeHostSingleThreadClient,
       public ui::UIResourceProvider,
       public ui::WindowAndroidCompositor {
  public:
-  class VSyncObserver {
-   public:
-    virtual void OnVSync(base::TimeTicks timebase,
-                         base::TimeDelta interval) = 0;
-  };
-
   CompositorImpl(CompositorClient* client, gfx::NativeWindow root_window);
   ~CompositorImpl() override;
 
   static bool IsInitialized();
 
-  void AddObserver(VSyncObserver* observer);
-  void RemoveObserver(VSyncObserver* observer);
-  void OnNeedsBeginFramesChange(bool needs_begin_frames);
-
   // ui::ResourceProvider implementation.
   cc::UIResourceId CreateUIResource(cc::UIResourceClient* client) override;
   void DeleteUIResource(cc::UIResourceId resource_id) override;
   bool SupportsETC1NonPowerOfTwo() const override;
 
  private:
   // Compositor implementation.
   void SetRootLayer(scoped_refptr<cc::Layer> root) override;
   void SetSurface(jobject surface) override;
   void setDeviceScaleFactor(float factor) override;
@@ skipping 24 matching lines @@
   void DidCompletePageScaleAnimation() override {}
 
   // LayerTreeHostSingleThreadClient implementation.
   void DidSubmitCompositorFrame() override;
   void DidLoseCompositorFrameSink() override;
 
   // WindowAndroidCompositor implementation.
   void AttachLayerForReadback(scoped_refptr<cc::Layer> layer) override;
   void RequestCopyOfOutputOnRootLayer(
       std::unique_ptr<cc::CopyOutputRequest> request) override;
-  void OnVSync(base::TimeTicks frame_time,
-               base::TimeDelta vsync_period) override;
   void SetNeedsAnimate() override;
   cc::FrameSinkId GetFrameSinkId() override;
 
   void SetVisible(bool visible);
   void CreateLayerTreeHost();
 
   void HandlePendingCompositorFrameSinkRequest();
 
 #if defined(ENABLE_VULKAN)
   void CreateVulkanOutputSurface();
@@ skipping 12 matching lines @@
   cc::FrameSinkId frame_sink_id_;
 
   // root_layer_ is the persistent internal root layer, while subroot_layer_
   // is the one attached by the compositor client.
   scoped_refptr<cc::Layer> subroot_layer_;
 
   // Subtree for hidden layers with CopyOutputRequests on them.
   scoped_refptr<cc::Layer> readback_layer_tree_;
 
   // Destruction order matters here:
-  base::ObserverList<VSyncObserver, true> observer_list_;
   std::unique_ptr<cc::AnimationHost> animation_host_;
   std::unique_ptr<cc::LayerTreeHost> host_;
   ui::ResourceManagerImpl resource_manager_;
 
   std::unique_ptr<cc::Display> display_;
 
   gfx::Size size_;
   bool has_transparent_background_;
   float device_scale_factor_;
 
@@ skipping 13 matching lines @@
 
   size_t num_successive_context_creation_failures_;
 
   // Whether there is an CompositorFrameSink request pending from the current
   // |host_|. Becomes |true| if RequestNewCompositorFrameSink is called, and
   // |false| if |host_| is deleted or we succeed in creating *and* initializing
   // a CompositorFrameSink (which is essentially the contract with cc).
   bool compositor_frame_sink_request_pending_;
 
   gpu::Capabilities gpu_capabilities_;
-  bool needs_begin_frames_;
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_