Use vsync manager regardless of begin frame settings

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index e7d12bf0361bff3ddf410d593e8ed9ae34869de0..b73eb8664434c9263ebec611943babf807eb583c 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -287,6 +287,12 @@ class COMPOSITOR_EXPORT Compositor
   // context.
   void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval);
 
+  // Most platforms set their vsync info via BrowerCompositorOutputSurface's
+  // OnUpdateVSyncParametersFromGpu, but Mac routes vsync info via the
+  // browser compositor instead through this path.
+  void SetDisplayVSyncParameters(base::TimeTicks timebase,
+                                 base::TimeDelta interval);
+
   // Sets the widget for the compositor to render into.
   void SetAcceleratedWidget(gfx::AcceleratedWidget widget);
   // Releases the widget previously set through SetAcceleratedWidget().