Hook up Mac OSX VSync parameters to compositor thread

content/browser/renderer_host/compositing_iosurface_mac.h

Index: content/browser/renderer_host/compositing_iosurface_mac.h
diff --git a/content/browser/renderer_host/compositing_iosurface_mac.h b/content/browser/renderer_host/compositing_iosurface_mac.h
index a345d1ec1846d11fe8c56d0484bdeff4a5cf1a26..8b5a04581d5c93b4b7b68a0cd6d91aab1ad897b0 100644
--- a/content/browser/renderer_host/compositing_iosurface_mac.h
+++ b/content/browser/renderer_host/compositing_iosurface_mac.h
@@ -74,6 +74,8 @@ class CompositingIOSurfaceMac {
   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);
@@ -158,7 +160,7 @@ class CompositingIOSurfaceMac {
 
   // Called on display-link thread.
   void DisplayLinkTick(CVDisplayLinkRef display_link,
-                       const CVTimeStamp* output_time);
+                       const CVTimeStamp* time);
 
   void CalculateVsyncParametersLockHeld(const CVTimeStamp* time);