Remove SendBeginFramesToChildren plumbing

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 272 matching lines @@
 
   // Trace this begin frame time through the Chrome stack
   TRACE_EVENT_FLOW_BEGIN0(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"), "BeginFrameArgs",
       args.frame_time.ToInternalValue());
 
   // TODO(brianderson): Adjust deadline in the DisplayScheduler.
   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;
   }
 
   // We have just called SetNeedsBeginFrame(true) and the BeginFrameSource has
   // sent us the last BeginFrame we have missed. As we might not be able to
   // actually make rendering for this call, handle it like a "retro frame".
   // TODO(brainderson): Add a test for this functionality ASAP!
   if (adjusted_args.type == BeginFrameArgs::MISSED) {
@@ skipping 13 matching lines @@
     begin_retro_frame_args_.push_back(adjusted_args);
     TRACE_EVENT_INSTANT0(
         "cc", "Scheduler::BeginFrame deferred", TRACE_EVENT_SCOPE_THREAD);
     // Queuing the frame counts as "using it", so we need to return true.
   } else {
     BeginImplFrameWithDeadline(adjusted_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();
 }
 
 void Scheduler::OnDrawForOutputSurface(bool resourceless_software_draw) {
   DCHECK(settings_.using_synchronous_renderer_compositor);
   DCHECK_EQ(state_machine_.begin_impl_frame_state(),
             SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_IDLE);
   DCHECK(!BeginImplFrameDeadlinePending());
@@ skipping 523 matching lines @@
 }
 
 bool Scheduler::IsBeginMainFrameSentOrStarted() const {
   return (state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_SENT ||
           state_machine_.begin_main_frame_state() ==
               SchedulerStateMachine::BEGIN_MAIN_FRAME_STATE_STARTED);
 }
 
 }  // namespace cc