cc: Add support for sending BeginFrames for video.

cc/scheduler/scheduler.cc

 // 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.
 
 #include "cc/scheduler/scheduler.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
@@ skipping 383 matching lines @@
   state_machine_.SetChildrenNeedBeginFrames(children_need_begin_frames);
   ProcessScheduledActions();
 }
 
 void Scheduler::SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) {
   authoritative_vsync_interval_ = interval;
   if (vsync_observer_)
     vsync_observer_->OnUpdateVSyncParameters(last_vsync_timebase_, interval);
 }
 
+void Scheduler::SetVideoNeedsBeginFrames(bool video_needs_begin_frames) {
+  state_machine_.SetVideoNeedsBeginFrames(video_needs_begin_frames);
+  ProcessScheduledActions();
+}
+
 void Scheduler::OnDrawForOutputSurface() {
   DCHECK(settings_.using_synchronous_renderer_compositor);
   DCHECK_EQ(state_machine_.begin_impl_frame_state(),
             SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
   DCHECK(!BeginImplFrameDeadlinePending());
 
   state_machine_.OnBeginImplFrameDeadline();
   ProcessScheduledActions();
 
   state_machine_.OnBeginImplFrameIdle();
@@ skipping 411 matching lines @@
 }
 
 bool Scheduler::IsBeginMainFrameSentOrStarted() const {
   return (state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT ||
           state_machine_.commit_state() ==
               SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED);
 }
 
 }  // namespace cc