setContentsClippingMaskLayer  503 Source/core/rendering/compositing/CompositedLayerMapping.cpp             m_graphicsLayer->setContentsClippingMaskLayer(m_childClippingMaskLayer.get());
setContentsClippingMaskLayer  125 Source/platform/graphics/GraphicsLayer.h     void setContentsClippingMaskLayer(GraphicsLayer*);