HasNonLayerViewportConstrainedObjects 926 Source/core/page/scrolling/ScrollingCoordinator.cpp mainThreadScrollingReasons |= HasNonLayerViewportConstrainedObjects; HasNonLayerViewportConstrainedObjects 939 Source/core/page/scrolling/ScrollingCoordinator.cpp if (reasons & ScrollingCoordinator::HasNonLayerViewportConstrainedObjects)