requiresCompositingForScrollableFrame 32 Source/core/rendering/compositing/CompositingReasonFinder.h bool requiresCompositingForScrollableFrame() const; requiresCompositingForScrollableFrame 256 Source/core/rendering/compositing/RenderLayerCompositor.cpp forceCompositingMode = m_compositingReasonFinder.requiresCompositingForScrollableFrame();