cc: Advance commit state with a CancelableClosure

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 7d577b0187ac334a9324f407990121a2f082eeb2..ca317c9f894082a31308a838a5d4b57203be2630 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -113,6 +113,7 @@ class CC_EXPORT Scheduler {
   void BeginImplFrame(const BeginFrameArgs& args);
   void OnBeginImplFrameDeadline();
   void PollForAnticipatedDrawTriggers();
+  void PollToAdvanceCommitState();
 
   scoped_ptr<base::Value> StateAsValue() const;
 
@@ -151,7 +152,7 @@ class CC_EXPORT Scheduler {
   BeginFrameArgs last_begin_impl_frame_args_;
   base::CancelableClosure begin_impl_frame_deadline_closure_;
   base::CancelableClosure poll_for_draw_triggers_closure_;
-  base::RepeatingTimer<Scheduler> advance_commit_state_timer_;
+  base::CancelableClosure advance_commit_state_closure_;
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;