Revert 151932 (caused gpu_throughput_tests to start failing on Mac GPU bots) - Hook up Mac OSX VSyn…

content/browser/renderer_host/compositing_iosurface_mac.h

Index: content/browser/renderer_host/compositing_iosurface_mac.h
===================================================================
--- content/browser/renderer_host/compositing_iosurface_mac.h	(revision 151981)
+++ content/browser/renderer_host/compositing_iosurface_mac.h	(working copy)
@@ -74,8 +74,6 @@
   bool is_vsync_disabled() const { return is_vsync_disabled_; }
 
   // Get vsync scheduling parameters.
-  // |interval_numerator/interval_denominator| equates to fractional number of
-  // seconds between vsyncs.
   void GetVSyncParameters(base::TimeTicks* timebase,
                           uint32* interval_numerator,
                           uint32* interval_denominator);
@@ -160,7 +158,7 @@
 
   // Called on display-link thread.
   void DisplayLinkTick(CVDisplayLinkRef display_link,
-                       const CVTimeStamp* time);
+                       const CVTimeStamp* output_time);
 
   void CalculateVsyncParametersLockHeld(const CVTimeStamp* time);