Add Set Authoritative VSync Interval function

cc/trees/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/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 1233 matching lines @@
                    &main_frame_will_happen));
     completion.Wait();
   }
   return main_frame_will_happen;
 }
 
 void ThreadProxy::SetChildrenNeedBeginFrames(bool children_need_begin_frames) {
   NOTREACHED() << "Only used by SingleThreadProxy";
 }
 
+void ThreadProxy::SetAuthoritativeVSyncInterval(base::TimeDelta interval) {
+  NOTREACHED() << "Only used by SingleThreadProxy";

[brianderson, 2014/12/12 01:11:39]

I think this will be true after CrOS is STP. If you want to land it before then
you'll need to forward it to the impl thread.

+}
+
 void ThreadProxy::MainFrameWillHappenOnImplThreadForTesting(
     CompletionEvent* completion,
     bool* main_frame_will_happen) {
   DCHECK(IsImplThread());
   if (impl().layer_tree_host_impl->output_surface()) {
     *main_frame_will_happen = impl().scheduler->MainFrameForTestingWillHappen();
   } else {
     *main_frame_will_happen = false;
   }
   completion->Signal();
@@ skipping 70 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidPrepareTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidPrepareTiles();
 }
 
 }  // namespace cc