Implement WebCompositorOutputSurface

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index f1eebcbf840c67884088cc9e66b503648894c756..3cd60f932507fd4af88c197700cc3e7c2a2905c8 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -358,6 +358,13 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // locked.
   bool GotResponseToLockMouseRequest(bool allowed);
 
+  // Tells the RenderWidget about the latest vsync parameters.
+  // Note: Make sure the timebase was obtained using
+  // base::TimeTicks::HighResNow. Using the non-high res timer will result in
+  // incorrect synchronization across processes.
+  virtual void UpdateVSyncParameters(base::TimeTicks timebase,
+                                     base::TimeDelta interval);

[jbates, 2012/08/08 16:55:09]

TimeDelta is OK for now since we are in a rush, but can you file a bug to make
this more accurate in a followup patch? Some platform/OS/driver combos will not
have a timebase (eg: XP + AMD family 15), so it will be up to the interval to
keep in sync with the refresh rate.

+
   // Called by the view in response to AcceleratedSurfaceBuffersSwapped or
   // AcceleratedSurfacePostSubBuffer.
   static void AcknowledgeBufferPresent(