cc: Add support for sending BeginFrames for video.

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 151 matching lines @@
   void SetDeferCommits(bool defer_commits);
 
   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 SetVideoNeedsBeginFrames(bool video_needs_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);
@@ skipping 70 matching lines @@
 
   friend class SchedulerFrameSourcesConstructor;
   friend class TestSchedulerFrameSourcesConstructor;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_