Hook up Mac OSX VSync parameters to compositor thread

ui/surface/accelerated_surface_win.cc

 // 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.
 
 #include "ui/surface/accelerated_surface_win.h"
 
 #include <dwmapi.h>
 #include <windows.h>
 #include <algorithm>
 
@@ skipping 839 matching lines @@
   }
 
   {
     TRACE_EVENT0("gpu", "GetPresentationStats");
     base::TimeTicks timebase;
     base::TimeDelta interval;
     uint32 numerator = 0, denominator = 0;
     if (GetPresentationStats(&timebase, &numerator, &denominator) &&
         numerator > 0 && denominator > 0) {
       int64 interval_micros =
-          static_cast<int64>(1000000 * numerator) / denominator;
+          1000000 * static_cast<int64>(numerator) / denominator;
       interval = base::TimeDelta::FromMicroseconds(interval_micros);
     }
     scoped_completion_runner.Release();
     completion_task.Run(true, timebase, interval);
     TRACE_EVENT2("gpu", "GetPresentationStats",
                  "timebase", timebase.ToInternalValue(),
                  "interval", interval.ToInternalValue());
   }
 
   hidden_ = false;
@@ skipping 52 matching lines @@
   return presenter_->CopyTo(src_subrect, dst_size, buf);
 }
 
 void AcceleratedSurface::Suspend() {
   presenter_->Suspend();
 }
 
 void AcceleratedSurface::WasHidden() {
   presenter_->WasHidden();
 }