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