Create a new action triggered when a BeginMainFrame is not expected before vsync

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 9efd831d76aad31df9c7b6e41d5484cd8eb7265b..660a11327138420bd0534eee00f89f6dc151f2f6 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -48,6 +48,8 @@ class SchedulerClient {
   virtual void ScheduledActionPerformImplSideInvalidation() = 0;
   virtual void DidFinishImplFrame() = 0;
   virtual void SendBeginMainFrameNotExpectedSoon() = 0;
+  virtual void ScheduledActionBeginMainFrameNotExpectedUntil(
+      base::TimeTicks frameTime) = 0;
 
  protected:
   virtual ~SchedulerClient() {}
@@ -189,6 +191,7 @@ class CC_EXPORT Scheduler : public BeginFrameObserverBase {
   void ScheduleBeginImplFrameDeadline();
   void ScheduleBeginImplFrameDeadlineIfNeeded();
   void BeginImplFrameNotExpectedSoon();
+  void ScheduleShortIdleWork(const BeginFrameArgs& args);
   void SetupNextBeginFrameIfNeeded();
   void DrawIfPossible();
   void DrawForced();