Set BrowserCompositorOutputSurface's vsync parameters on mac

ui/compositor/compositor.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_COMPOSITOR_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 127 matching lines @@
   // Resize the display corresponding to this compositor to a particular size.
   virtual void ResizeDisplay(ui::Compositor* compositor,
                              const gfx::Size& size) = 0;
 
   // Set the output color profile into which this compositor should render.
   virtual void SetDisplayColorSpace(ui::Compositor* compositor,
                                     const gfx::ColorSpace& color_space) = 0;
 
   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;
 
   virtual void AddObserver(ContextFactoryObserver* observer) = 0;
 
   virtual void RemoveObserver(ContextFactoryObserver* observer) = 0;
 };
 
 // This class represents a lock on the compositor, that can be used to prevent
 // commits to the compositor tree while we're waiting for an asynchronous
@@ skipping 238 matching lines @@
   scoped_refptr<cc::AnimationTimeline> animation_timeline_;
 
   base::WeakPtrFactory<Compositor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_