Remove SendBeginFramesToChildren plumbing

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 3fb8b3b13de76c935daf8d28d9b8cdd529ac2cb9..ef2b9dc5b6cd30dfd13e3f9c86f679a8d75d9544 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -289,11 +289,6 @@ bool Scheduler::OnBeginFrameDerivedImpl(const BeginFrameArgs& args) {
   BeginFrameArgs adjusted_args(args);
   adjusted_args.deadline -= EstimatedParentDrawTime();
 
-  // Deliver BeginFrames to children.
-  // TODO(brianderson): Move this responsibility to the DisplayScheduler.
-  if (state_machine_.children_need_begin_frames())
-    client_->SendBeginFramesToChildren(adjusted_args);
-
   if (settings_.using_synchronous_renderer_compositor) {
     BeginImplFrameSynchronous(adjusted_args);
     return true;
@@ -327,11 +322,6 @@ bool Scheduler::OnBeginFrameDerivedImpl(const BeginFrameArgs& args) {
   return true;
 }
 
-void Scheduler::SetChildrenNeedBeginFrames(bool children_need_begin_frames) {
-  state_machine_.SetChildrenNeedBeginFrames(children_need_begin_frames);
-  ProcessScheduledActions();
-}
-
 void Scheduler::SetVideoNeedsBeginFrames(bool video_needs_begin_frames) {
   state_machine_.SetVideoNeedsBeginFrames(video_needs_begin_frames);
   ProcessScheduledActions();