[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 48a67128acc7ba105122f11dabe1f1a5553532fd..e2cd204b3a35f5004c799103f632d60b0d3c80ec 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 OnSwapCompositorFrame(uint32_t compositor_frame_sink_id,
                              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;
@@ -332,6 +333,8 @@ 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.