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 b2e500cb705a32927a3b7498889833d5e2379454..bd9a6bf3c3fd5f7e2cc123fd6f2003748af0782f 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);
+
   // Called by the view in response to AcceleratedSurfaceBuffersSwapped or
   // AcceleratedSurfacePostSubBuffer.
   static void AcknowledgeBufferPresent(