cc: Fix ScrollbarLayer overflow

cc/layers/painted_scrollbar_layer.cc

Index: cc/layers/painted_scrollbar_layer.cc
diff --git a/cc/layers/painted_scrollbar_layer.cc b/cc/layers/painted_scrollbar_layer.cc
index 7a65992d34320dcd3a62e83c2e54737b1a15de90..8ee3cb75bd148fdac9dcd478e80a4e97d2e86c12 100644
--- a/cc/layers/painted_scrollbar_layer.cc
+++ b/cc/layers/painted_scrollbar_layer.cc
@@ -88,7 +88,7 @@ float PaintedScrollbarLayer::ClampScaleToMaxTextureSize(float scale) {
   gfx::Size scaled_bounds = gfx::ScaleToCeiledSize(bounds(), scale);
   if (scaled_bounds.width() > MaxTextureSize() ||
       scaled_bounds.height() > MaxTextureSize()) {
-    if (scaled_bounds.width() > scaled_bounds.height())
+    if (bounds().width() > bounds().height())
       return (MaxTextureSize() - 1) / static_cast<float>(bounds().width());
     else
       return (MaxTextureSize() - 1) / static_cast<float>(bounds().height());