cc: Add support for sending BeginFrames for video.

cc/trees/single_thread_proxy.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/trees/single_thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/debug/benchmark_instrumentation.h"
@@ skipping 440 matching lines @@
   layer_tree_host_impl_->SetViewportDamage(damage_rect);
   SetNeedsRedrawOnImplThread();
 }
 
 void SingleThreadProxy::SetNeedsCommitOnImplThread() {
   client_->ScheduleComposite();
   if (scheduler_on_impl_thread_)
     scheduler_on_impl_thread_->SetNeedsCommit();
 }
 
+void SingleThreadProxy::SetVideoNeedsBeginFrames(bool needs_begin_frames) {
+  TRACE_EVENT1("cc", "SingleThreadProxy::SetVideoNeedsBeginFrames",
+               "needs_begin_frames", needs_begin_frames);
+  // In tests the layer tree is destroyed after the scheduler is.
+  if (scheduler_on_impl_thread_)
+    scheduler_on_impl_thread_->SetVideoNeedsBeginFrames(needs_begin_frames);
+}
+
 void SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread(
     scoped_ptr<AnimationEventsVector> events) {
   TRACE_EVENT0(
       "cc", "SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread");
   DCHECK(Proxy::IsImplThread());
   DebugScopedSetMainThread main(this);
   layer_tree_host_->SetAnimationEvents(events.Pass());
 }
 
 bool SingleThreadProxy::ReduceContentsTextureMemoryOnImplThread(
@@ skipping 469 matching lines @@
 
 void SingleThreadProxy::DidBeginImplFrameDeadline() {
   layer_tree_host_impl_->ResetCurrentBeginFrameArgsForNextFrame();
 }
 
 void SingleThreadProxy::SendBeginFramesToChildren(const BeginFrameArgs& args) {
   layer_tree_host_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc