Set BrowserCompositorOutputSurface's vsync parameters on mac

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index ee39c5943659e8f49eebe333bde230ea1ff3f9ac..67a361a6eb0619318cad02226e54f96941dae78b 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -145,6 +145,11 @@ class COMPOSITOR_EXPORT ContextFactory {
 
   virtual void SetAuthoritativeVSyncInterval(ui::Compositor* compositor,
                                              base::TimeDelta interval) = 0;
+  // Mac path for transporting vsync parameters to the display.  Other platforms
+  // update it via the BrowserCompositorOutputSurface directly.
+  virtual void SetDisplayVSyncParameters(ui::Compositor* compositor,
+                                         base::TimeTicks timebase,
+                                         base::TimeDelta interval) = 0;
 
   virtual void SetOutputIsSecure(Compositor* compositor, bool secure) = 0;