Deliver IPC messages together with SwapCompositorFrame

cc/base/swap_promise.h

Index: cc/base/swap_promise.h
diff --git a/cc/base/swap_promise.h b/cc/base/swap_promise.h
index 36a5b130a50498ae33e56aab4bb97320246a7289..4fab29fc5a528c1f52b1756e736a2ab7d61c88b6 100644
--- a/cc/base/swap_promise.h
+++ b/cc/base/swap_promise.h
@@ -9,8 +9,6 @@
 
 namespace cc {
 
-const unsigned int kMaxQueuedSwapPromiseNumber = 100;
-
 // When a change to the compositor's state/invalidation/whatever happens, a
 // Swap Promise can be inserted into LayerTreeHost/LayerTreeImpl, to track
 // whether the compositor's reply to the new state/invaliadtion/whatever is
@@ -41,7 +39,8 @@ class CC_EXPORT SwapPromise {
   SwapPromise() {}
   virtual ~SwapPromise() {}
 
-  virtual void DidSwap(CompositorFrameMetadata* metadata) = 0;
+  virtual void DidSwap(int source_frame_number,
+                       CompositorFrameMetadata* metadata) = 0;
   virtual void DidNotSwap(DidNotSwapReason reason) = 0;
 };