Disable retroactive begin frame for synchronous compositor

content/browser/android/in_process/synchronous_compositor_output_surface.cc

 // Copyright 2013 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 "content/browser/android/in_process/synchronous_compositor_output_surface.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/time.h"
 #include "cc/output/begin_frame_args.h"
@@ skipping 209 matching lines @@
     gfx::Size damage_size) {
   did_swap_buffer_ = false;
   SetNeedsRedrawRect(gfx::Rect(damage_size));
   if (needs_begin_frame_)
     BeginFrame(cc::BeginFrameArgs::CreateForSynchronousCompositor());
 
   if (did_swap_buffer_)
     OnSwapBuffersComplete(NULL);
 }
 
+void SynchronousCompositorOutputSurface::PostCheckForRetroactiveBeginFrame() {
+  // Synchronous compositor cannot perform retroactive begin frames, so
+  // intentionally no-op here.
+}
+
 // Not using base::NonThreadSafe as we want to enforce a more exacting threading
 // requirement: SynchronousCompositorOutputSurface() must only be used on the UI
 // thread.
 bool SynchronousCompositorOutputSurface::CalledOnValidThread() const {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
+

[brianderson, 2013/06/20 23:42:21]

nit: whitespace

 SynchronousCompositorOutputSurfaceDelegate*
 SynchronousCompositorOutputSurface::GetDelegate() {
   return SynchronousCompositorImpl::FromRoutingID(routing_id_);
 }
 
 }  // namespace content