Support distributing vsync info with surfaces.

content/browser/compositor/gpu_process_transport_factory.cc

 // Copyright 2014 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/compositor/gpu_process_transport_factory.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 193 matching lines @@
     scoped_refptr<cc::ContextProvider> offscreen_context_provider;
     if (context_provider.get()) {
       offscreen_context_provider = ContextProviderCommandBuffer::Create(
           GpuProcessTransportFactory::CreateOffscreenCommandBufferContext(),
           "Offscreen-Compositor");
     }
     scoped_ptr<SurfaceDisplayOutputSurface> output_surface(
         new SurfaceDisplayOutputSurface(manager,
           next_surface_id_namespace_++,
           offscreen_context_provider));
+    display_client->set_surface_output_surface(output_surface.get());
     output_surface->set_display(display_client->display());
     data->display_client = display_client.Pass();
     return output_surface.PassAs<cc::OutputSurface>();
   }
 
   if (!context_provider.get()) {
     if (compositor_thread_.get()) {
       LOG(FATAL) << "Failed to create UI context, but can't use software"
                  " compositing with browser threaded compositing. Aborting.";
     }
@@ skipping 236 matching lines @@
   FOR_EACH_OBSERVER(ImageTransportFactoryObserver,
                     observer_list_,
                     OnLostResources());
 
   // Kill things that use the shared context before killing the shared context.
   lost_gl_helper.reset();
   lost_shared_main_thread_contexts  = NULL;
 }
 
 }  // namespace content