Hook up DidReceiveInputEvent to the blink scheduler

content/renderer/scheduler/renderer_scheduler.h

Index: content/renderer/scheduler/renderer_scheduler.h
diff --git a/content/renderer/scheduler/renderer_scheduler.h b/content/renderer/scheduler/renderer_scheduler.h
index 39945ae65b3208221ee86686db213d7ed9fbd5df..d88efc15019d044aa4e1b7fed5f0a53f939712ab 100644
--- a/content/renderer/scheduler/renderer_scheduler.h
+++ b/content/renderer/scheduler/renderer_scheduler.h
@@ -43,6 +43,10 @@ class CONTENT_EXPORT RendererScheduler {
   // compositor (impl) thread.
   virtual void DidReceiveInputEventOnCompositorThread() = 0;
 
+  // Tells the scheduler that the system is displaying an input animation (e.g.
+  // a fling). Called by the compositor (impl) thread.
+  virtual void DidAnimateForInputOnCompositorThread() = 0;
+
   // Returns true if there is high priority work pending on the main thread
   // and the caller should yield to let the scheduler service that work.
   // Must be called from the main thread.