cc: Add SetChildrenNeedBeginFrames() & SendBeginFramesToChildren()

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 31 matching lines @@
   virtual void ScheduledActionCommit() = 0;
   virtual void ScheduledActionUpdateVisibleTiles() = 0;
   virtual void ScheduledActionActivateSyncTree() = 0;
   virtual void ScheduledActionBeginOutputSurfaceCreation() = 0;
   virtual void ScheduledActionManageTiles() = 0;
   virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) = 0;
   virtual base::TimeDelta DrawDurationEstimate() = 0;
   virtual base::TimeDelta BeginMainFrameToCommitDurationEstimate() = 0;
   virtual base::TimeDelta CommitToActivateDurationEstimate() = 0;
   virtual void DidBeginImplFrameDeadline() = 0;
+  virtual void SendBeginFramesToChildren(const BeginFrameArgs& args) = 0;
 
  protected:
   virtual ~SchedulerClient() {}
 };
 
 class Scheduler;
 // This class exists to allow tests to override the frame source construction.
 // A virtual method can't be used as this needs to happen in the constructor
 // (see C++ FAQ / Section 23 - http://goo.gl/fnrwom for why).
 // This class exists solely long enough to construct the frame sources.
@@ skipping 25 matching lines @@
                                          scheduler_settings,
                                          layer_tree_host_id,
                                          task_runner,
                                          power_monitor,
                                          external_begin_frame_source.Pass(),
                                          &frame_sources_constructor));
   }
 
   ~Scheduler() override;
 
+  // BeginFrameObserverMixin
+  bool OnBeginFrameMixInDelegate(const BeginFrameArgs& args) override;
+
   // base::PowerObserver method.
   void OnPowerStateChange(bool on_battery_power) override;
 
   const SchedulerSettings& settings() const { return settings_; }
 
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval);
   void SetEstimatedParentDrawTime(base::TimeDelta draw_time);
 
   void SetCanStart();
@@ skipping 52 matching lines @@
 
   base::TimeTicks LastBeginImplFrameTime();
 
   scoped_refptr<base::debug::ConvertableToTraceFormat> AsValue() const;
   void AsValueInto(base::debug::TracedValue* value) const override;
 
   void SetContinuousPainting(bool continuous_painting) {
     state_machine_.SetContinuousPainting(continuous_painting);
   }
 
-  // BeginFrameObserverMixin
-  bool OnBeginFrameMixInDelegate(const BeginFrameArgs& args) override;
+  void SetChildrenNeedBeginFrames(bool children_need_begin_frames);
 
  protected:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
             int layer_tree_host_id,
             const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
             base::PowerMonitor* power_monitor,
             scoped_ptr<BeginFrameSource> external_begin_frame_source,
             SchedulerFrameSourcesConstructor* frame_sources_constructor);
 
@@ skipping 71 matching lines @@
 
   friend class SchedulerFrameSourcesConstructor;
   friend class TestSchedulerFrameSourcesConstructor;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_