[cc] Forward BeginFrameAcks through RWHVAndroid / DFHAndroid.

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 76c4de05511b959e1a9ffc91a5568c76a4314b89..f87762d546fd67173bfe1127f4927d8a7168fd47 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -133,6 +133,7 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
   void DidCreateNewRendererCompositorFrameSink() override;
   void SubmitCompositorFrame(const cc::LocalSurfaceId& local_surface_id,
                              cc::CompositorFrame frame) override;
+  void OnBeginFrameDidNotSwap(const cc::BeginFrameAck& ack) override;
   void ClearCompositorFrame() override;
   void SetIsInVR(bool is_in_vr) override;
   bool IsInVR() const override;
@@ -304,6 +305,7 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
   };
   void AddBeginFrameRequest(BeginFrameRequestType request);
   void ClearBeginFrameRequest(BeginFrameRequestType request);
+  void AcknowledgeBeginFrame(const cc::BeginFrameAck& ack);
   void StartObservingRootWindow();
   void StopObservingRootWindow();
   void SendBeginFrame(cc::BeginFrameArgs args);
@@ -322,6 +324,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
   // The begin frame source being observed.  Null if none.
   cc::BeginFrameSource* begin_frame_source_;
   cc::BeginFrameArgs last_begin_frame_args_;
+  uint32_t latest_confirmed_begin_frame_source_id_;
+  uint64_t latest_confirmed_begin_frame_sequence_number_;
 
   // Indicates whether and for what reason a request for begin frames has been
   // issued. Used to control action dispatch at the next |OnBeginFrame()| call.