overflowRequiresScrollbar  724 Source/core/rendering/RenderLayerScrollableArea.cpp     bool needsHorizontalScrollbar = (hasHorizontalScrollbar() && overflowDefinesAutomaticScrollbar(overflowX)) || overflowRequiresScrollbar(overflowX);
overflowRequiresScrollbar  725 Source/core/rendering/RenderLayerScrollableArea.cpp     bool needsVerticalScrollbar = (hasVerticalScrollbar() && overflowDefinesAutomaticScrollbar(overflowY)) || overflowRequiresScrollbar(overflowY);