Read compositor VSync information from platform, when possible

ui/compositor/test/draw_waiter_for_test.cc

Index: ui/compositor/test/draw_waiter_for_test.cc
diff --git a/ui/compositor/test/draw_waiter_for_test.cc b/ui/compositor/test/draw_waiter_for_test.cc
index 8429675e94bed99b6cd2528fb65af2954edc74be..c471a6ff6b0a155c48ac78d201d8e4ff56dc6305 100644
--- a/ui/compositor/test/draw_waiter_for_test.cc
+++ b/ui/compositor/test/draw_waiter_for_test.cc
@@ -50,8 +50,4 @@ void DrawWaiterForTest::OnCompositingAborted(Compositor* compositor) {}
 
 void DrawWaiterForTest::OnCompositingLockStateChanged(Compositor* compositor) {}
 
-void DrawWaiterForTest::OnUpdateVSyncParameters(Compositor* compositor,
-                                                base::TimeTicks timebase,
-                                                base::TimeDelta interval) {}
-
 }  // namespace ui