Remove SendBeginFramesToChildren plumbing

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 <memory>
 #include <string>
@@ skipping 28 matching lines @@
   virtual void ScheduledActionSendBeginMainFrame(
       const BeginFrameArgs& args) = 0;
   virtual DrawResult ScheduledActionDrawAndSwapIfPossible() = 0;
   virtual DrawResult ScheduledActionDrawAndSwapForced() = 0;
   virtual void ScheduledActionCommit() = 0;
   virtual void ScheduledActionActivateSyncTree() = 0;
   virtual void ScheduledActionBeginOutputSurfaceCreation() = 0;
   virtual void ScheduledActionPrepareTiles() = 0;
   virtual void ScheduledActionInvalidateOutputSurface() = 0;
   virtual void DidFinishImplFrame() = 0;
-  virtual void SendBeginFramesToChildren(const BeginFrameArgs& args) = 0;
   virtual void SendBeginMainFrameNotExpectedSoon() = 0;
 
  protected:
   virtual ~SchedulerClient() {}
 };
 
 class CC_EXPORT Scheduler : public BeginFrameObserverBase {
  public:
   static std::unique_ptr<Scheduler> Create(
       SchedulerClient* client,
@@ skipping 71 matching lines @@
   // scheduling or statistics purposes.
   void NotifyBeginMainFrameStarted(base::TimeTicks main_thread_start_time);
 
   base::TimeTicks LastBeginImplFrameTime();
 
   void SetDeferCommits(bool defer_commits);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat> AsValue() const;
   void AsValueInto(base::trace_event::TracedValue* value) const override;
 
-  void SetChildrenNeedBeginFrames(bool children_need_begin_frames);
   void SetVideoNeedsBeginFrames(bool video_needs_begin_frames);
 
   const BeginFrameSource* begin_frame_source() const {
     return begin_frame_source_;
   }
 
  protected:
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings,
             int layer_tree_host_id,
@@ skipping 68 matching lines @@
   }
 
   base::WeakPtrFactory<Scheduler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_