Add DisplayScheduler for Surfaces

cc/scheduler/scheduler.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_SCHEDULER_SCHEDULER_H_
 #define CC_SCHEDULER_SCHEDULER_H_
 
 #include <deque>
 #include <string>
 
@@ skipping 79 matching lines @@
                                          &frame_sources_constructor));
   }
 
   ~Scheduler() override;
 
   // BeginFrameObserverMixin
   bool OnBeginFrameMixInDelegate(const BeginFrameArgs& args) override;
 
   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);
 
   void SetCanStart();
 
   void SetVisible(bool visible);
   void SetCanDraw(bool can_draw);
   void NotifyReadyToActivate();
   void NotifyReadyToDraw();
@@ skipping 49 matching lines @@
 
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
   void AsValueInto(base::trace_event::TracedValue* value) const override;
 
   void SetContinuousPainting(bool continuous_painting) {
     state_machine_.SetContinuousPainting(continuous_painting);
   }
 
   void SetChildrenNeedBeginFrames(bool children_need_begin_frames);
 
-  void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval);
-
  protected:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
             int layer_tree_host_id,
             const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
             scoped_ptr<BeginFrameSource> external_begin_frame_source,
             SchedulerFrameSourcesConstructor* frame_sources_constructor);
 
   // virtual for testing - Don't call these in the constructor or
   // destructor!
@@ skipping 70 matching lines @@
 
   friend class SchedulerFrameSourcesConstructor;
   friend class TestSchedulerFrameSourcesConstructor;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_