Hook up Mac OSX VSync parameters to compositor thread

ui/surface/accelerated_surface_win.cc

Index: ui/surface/accelerated_surface_win.cc
diff --git a/ui/surface/accelerated_surface_win.cc b/ui/surface/accelerated_surface_win.cc
index 3dd097c71d8e3bbed255630307eede3fd4789190..2fadfc00fdd31e64b4ca04acd7695b803428162b 100644
--- a/ui/surface/accelerated_surface_win.cc
+++ b/ui/surface/accelerated_surface_win.cc
@@ -857,7 +857,7 @@ void AcceleratedPresenter::DoPresentAndAcknowledge(
     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();