[cc] Plumb BeginFrameAcks through SurfaceManager to DisplayScheduler.

cc/surfaces/surface_manager.h

Index: cc/surfaces/surface_manager.h
diff --git a/cc/surfaces/surface_manager.h b/cc/surfaces/surface_manager.h
index 293f4c8af80a037f6c3660f08cd02cb4b640e161..b79af559bf6049d52f338f6060c4e2f311422ac9 100644
--- a/cc/surfaces/surface_manager.h
+++ b/cc/surfaces/surface_manager.h
@@ -35,6 +35,9 @@
 #endif
 
 namespace cc {
+
+struct BeginFrameAck;
+struct BeginFrameArgs;
 class BeginFrameSource;
 class CompositorFrame;
 class FrameSinkManagerClient;
@@ -101,6 +104,16 @@ class CC_SURFACES_EXPORT SurfaceManager {
   // Called when |surface| is being destroyed.
   void SurfaceDiscarded(Surface* surface);
 
+  // Called when a Surface's CompositorFrame producer has received a BeginFrame.
+  void SurfaceReceivedBeginFrame(const SurfaceId& surface_id,
+                                 const BeginFrameArgs& args);
+
+  // Called when a Surface's CompositorFrame producer has completed a BeginFrame
+  // either by submitting a CompositorFrame or confirming that it will not
+  // submit one.
+  void SurfaceFinishedBeginFrame(const SurfaceId& surface_id,
+                                 const BeginFrameAck& ack);
+
   // Require that the given sequence number must be satisfied (using
   // SatisfySequence) before the given surface can be destroyed.
   void RequireSequence(const SurfaceId& surface_id,