[cc] Plumb BeginFrameAcks through SurfaceManager to DisplayScheduler.

cc/surfaces/compositor_frame_sink_support.h

Index: cc/surfaces/compositor_frame_sink_support.h
diff --git a/cc/surfaces/compositor_frame_sink_support.h b/cc/surfaces/compositor_frame_sink_support.h
index 5eda4c0feb63e4c7588f750d37dc89058e8f60f1..a0513fee635aefbe1280494682b98dfe700e6ad7 100644
--- a/cc/surfaces/compositor_frame_sink_support.h
+++ b/cc/surfaces/compositor_frame_sink_support.h
@@ -13,8 +13,10 @@
 #include "base/memory/weak_ptr.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/scheduler/begin_frame_source.h"
+#include "cc/surfaces/frame_sink_manager.h"
 #include "cc/surfaces/frame_sink_manager_client.h"
 #include "cc/surfaces/referenced_surface_tracker.h"
+#include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_resource_holder.h"
 #include "cc/surfaces/surface_resource_holder_client.h"
@@ -23,7 +25,6 @@
 namespace cc {
 
 class CompositorFrameSinkSupportClient;
-class Surface;
 class SurfaceManager;
 
 class CC_SURFACES_EXPORT CompositorFrameSinkSupport
@@ -104,6 +105,7 @@ class CC_SURFACES_EXPORT CompositorFrameSinkSupport
   const BeginFrameArgs& LastUsedBeginFrameArgs() const override;
   void OnBeginFrameSourcePausedChanged(bool paused) override;
 
+  void SetProducerState(Surface::ProducerState state);
   void UpdateNeedsBeginFramesInternal();
   std::unique_ptr<Surface> CreateSurface(
       const LocalSurfaceId& local_surface_id);
@@ -129,6 +131,13 @@ class CC_SURFACES_EXPORT CompositorFrameSinkSupport
   // The last begin frame args generated by the begin frame source.
   BeginFrameArgs last_begin_frame_args_;
 
+  // The last BeginFrameAck sent by the client.
+  BeginFrameAck last_begin_frame_ack_;
+
+  // Our current CompositorFrame producer state. This is also propagated to the
+  // current_surface_, if it exists.
+  Surface::ProducerState producer_state_ = Surface::IDLE;
+
   // Whether a request for begin frames has been issued.
   bool needs_begin_frame_ = false;