cc: Heuristic for Renderer latency recovery

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 13daf008cc338935212784a6e4b188215ce54b2e..0a2945b3a08f59786fa12a45e7055ceea655626e 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -98,6 +98,7 @@ class CC_EXPORT Scheduler : public BeginFrameObserverMixIn {
 
   const SchedulerSettings& settings() const { return settings_; }
 
+  void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval);
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval);
   void SetEstimatedParentDrawTime(base::TimeDelta draw_time);
@@ -145,9 +146,6 @@ class CC_EXPORT Scheduler : public BeginFrameObserverMixIn {
   bool PrepareTilesPending() const {
     return state_machine_.PrepareTilesPending();
   }
-  bool MainThreadIsInHighLatencyMode() const {
-    return state_machine_.MainThreadIsInHighLatencyMode();
-  }
   bool BeginImplFrameDeadlinePending() const {
     return !begin_impl_frame_deadline_task_.IsCancelled();
   }
@@ -170,8 +168,6 @@ class CC_EXPORT Scheduler : public BeginFrameObserverMixIn {
   void SetChildrenNeedBeginFrames(bool children_need_begin_frames);
   void SetVideoNeedsBeginFrames(bool video_needs_begin_frames);
 
-  void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval);
-
  protected:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
@@ -230,6 +226,7 @@ class CC_EXPORT Scheduler : public BeginFrameObserverMixIn {
   void DrawAndSwapIfPossible();
   void ProcessScheduledActions();
   bool CanCommitAndActivateBeforeDeadline() const;
+  bool CanDrawBeforeDeadline() const;
   void AdvanceCommitStateIfPossible();
   bool IsBeginMainFrameSentOrStarted() const;
   void BeginRetroFrame();