Reapply the non-MathExtras parts of

Source/platform/mac/ThemeMac.mm

Index: Source/platform/mac/ThemeMac.mm
diff --git a/Source/platform/mac/ThemeMac.mm b/Source/platform/mac/ThemeMac.mm
index a405ba50289a7383c1ea37a1c0dfb4bb5d6caf89..0c8007f2a7abc4c79d2524b6313d38fe4a0766cb 100644
--- a/Source/platform/mac/ThemeMac.mm
+++ b/Source/platform/mac/ThemeMac.mm
@@ -550,7 +550,7 @@ static void paintStepper(ControlStates states, GraphicsContext* context, const I
     // Center the stepper rectangle in the specified area.
     backgroundBounds.origin.x = bounds.origin.x + (bounds.size.width - backgroundBounds.size.width) / 2;
     if (backgroundBounds.size.height < bounds.size.height) {
-        int heightDiff = clampToInteger(bounds.size.height - backgroundBounds.size.height);
+        int heightDiff = clampTo<int>(bounds.size.height - backgroundBounds.size.height);
         backgroundBounds.origin.y = bounds.origin.y + (heightDiff / 2) + 1;
     }