cc: Hook vsync time source to output surface

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 4dee1b3dfab32ce88e1454853b4688989c6ae328..1263a93e2b5c41785d23635a7dc1c357e7474b49 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -908,6 +908,10 @@ void LayerTreeHostImpl::OnVSyncParametersChanged(base::TimeTicks timebase,
   client_->OnVSyncParametersChanged(timebase, interval);
 }
 
+void LayerTreeHostImpl::DidVSync(base::TimeTicks frame_time) {
+  client_->DidVSync(frame_time);
+}
+
 void LayerTreeHostImpl::OnSendFrameToParentCompositorAck(
     const CompositorFrameAck& ack) {
   if (!renderer_)
@@ -1025,6 +1029,11 @@ bool LayerTreeHostImpl::SwapBuffers() {
   return renderer_->SwapBuffers();
 }
 
+void LayerTreeHostImpl::EnableVSyncNotification(bool enable) {
+  if (output_surface_)
+    output_surface_->EnableVSyncNotification(enable);
+}
+
 gfx::Size LayerTreeHostImpl::DeviceViewportSize() const {
   return device_viewport_size();
 }