Report accelerated surface vsync time info to browser compositor.

content/common/gpu/image_transport_surface_win.cc

Index: content/common/gpu/image_transport_surface_win.cc
diff --git a/content/common/gpu/image_transport_surface_win.cc b/content/common/gpu/image_transport_surface_win.cc
index 28a24496287db205027576e8bcb1effc44e683b1..bddcf06d947063120cfd2b776d43f7275a7fbaa0 100644
--- a/content/common/gpu/image_transport_surface_win.cc
+++ b/content/common/gpu/image_transport_surface_win.cc
@@ -207,7 +207,9 @@ void PbufferImageTransportSurface::SendBuffersSwapped() {
 }
 
 void PbufferImageTransportSurface::OnBufferPresented(
-    const AcceleratedSurfaceMsg_BufferPresented_Params& /* params */) {
+    const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
+  helper_->SendUpdateVSyncParameters(params.vsync_timebase,
+                                     params.vsync_interval);
   is_swap_buffers_pending_ = false;
   if (did_unschedule_) {
     did_unschedule_ = false;