[cc] Plumb BeginFrameAcks through SurfaceManager to DisplayScheduler.

cc/surfaces/surface.h

Index: cc/surfaces/surface.h
diff --git a/cc/surfaces/surface.h b/cc/surfaces/surface.h
index 2e0996821ec35630b863bf340b78a4146c369029..5393efc1e52e90dd7ce586e22c972067403c9dc6 100644
--- a/cc/surfaces/surface.h
+++ b/cc/surfaces/surface.h
@@ -18,8 +18,8 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/optional.h"
+#include "cc/output/compositor_frame.h"
 #include "cc/output/copy_output_request.h"
-#include "cc/surfaces/compositor_frame_sink_support.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
@@ -32,14 +32,22 @@ class LatencyInfo;
 
 namespace cc {
 
-class CompositorFrame;
+class CompositorFrameSinkSupport;
 class CopyOutputRequest;
+class SurfaceManager;
 
 class CC_SURFACES_EXPORT Surface {
  public:
   using WillDrawCallback =
       base::RepeatingCallback<void(const LocalSurfaceId&, const gfx::Rect&)>;
 
+  // State of a CompositorFrame producer.
+  enum ProducerState {
+    IDLE,     // Has acknowledged the latest BeginFrame or is inactive.
+    PENDING,  // Waiting for response to the last BeginFrame.
+    READY     // A CompositorFrame was submitted but not yet drawn.
+  };
+
   Surface(
       const SurfaceId& id,
       base::WeakPtr<CompositorFrameSinkSupport> compositor_frame_sink_support);
@@ -120,6 +128,11 @@ class CC_SURFACES_EXPORT Surface {
   bool HasActiveFrame() const { return active_frame_data_.has_value(); }
   bool HasPendingFrame() const { return pending_frame_data_.has_value(); }
 
+  // Get/Set the state of the producer that submits CompositorFrames to this
+  // surface.
+  ProducerState GetProducerState() const { return producer_state_; }
+  void SetProducerState(ProducerState state);
+
   bool destroyed() const { return destroyed_; }
   void set_destroyed(bool destroyed) { destroyed_ = destroyed; }
 
@@ -170,6 +183,11 @@ class CC_SURFACES_EXPORT Surface {
 
   base::flat_set<SurfaceId> blocking_surfaces_;
 
+  // The current state of the producer that submits CompositorFrames to this
+  // surface. This state helps the DisplayScheduler decide whether to wait for
+  // damage on this surface.
+  ProducerState producer_state_ = IDLE;
+
   DISALLOW_COPY_AND_ASSIGN(Surface);
 };