ScrollbarModesCalculationStrategy 575 Source/core/frame/FrameView.cpp void FrameView::calculateScrollbarModesForLayoutAndSetViewportRenderer(ScrollbarMode& hMode, ScrollbarMode& vMode, ScrollbarModesCalculationStrategy strategy) ScrollbarModesCalculationStrategy 247 Source/core/frame/FrameView.h void calculateScrollbarModesForLayoutAndSetViewportRenderer(ScrollbarMode& hMode, ScrollbarMode& vMode, ScrollbarModesCalculationStrategy = AnyRule);