cc: Hook vsync time source to output surface

cc/test/fake_layer_tree_host_impl_client.h

Index: cc/test/fake_layer_tree_host_impl_client.h
diff --git a/cc/test/fake_layer_tree_host_impl_client.h b/cc/test/fake_layer_tree_host_impl_client.h
index 4ed6442d515562a4afc5184d3f0fc473cb2648bb..61555bb222ba3ea01a4e821f3ac47112cf2d5b4e 100644
--- a/cc/test/fake_layer_tree_host_impl_client.h
+++ b/cc/test/fake_layer_tree_host_impl_client.h
@@ -17,6 +17,7 @@ class FakeLayerTreeHostImplClient : public LayerTreeHostImplClient {
   virtual void OnVSyncParametersChanged(
       base::TimeTicks,
       base::TimeDelta) OVERRIDE {}
+  virtual void DidVSync(base::TimeTicks frame_time) OVERRIDE {}
   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE {}
   virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) OVERRIDE {}
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE {}