layerWasAdded    1465 Source/core/rendering/RenderLayer.cpp     compositor()->layerWasAdded(this, child);
layerWasAdded    3697 Source/core/rendering/RenderLayer.cpp         compositor()->layerWasAdded(m_parent, this);
layerWasAdded     137 Source/core/rendering/compositing/RenderLayerCompositor.h     void layerWasAdded(RenderLayer* parent, RenderLayer* child);