updateBackgroundLayer  199 Source/core/rendering/compositing/CompositedLayerMapping.cpp     updateBackgroundLayer(false);
updateBackgroundLayer  446 Source/core/rendering/compositing/CompositedLayerMapping.cpp     if (updateBackgroundLayer(m_backgroundLayerPaintsFixedRootBackground))
updateBackgroundLayer  217 Source/core/rendering/compositing/CompositedLayerMapping.h     bool updateBackgroundLayer(bool needsBackgroundLayer);