PaintLayerPaintingCompositingBackgroundPhase   69 Source/core/rendering/LayerPaintingInfo.h     PaintLayerPaintingCompositingAllPhases = (PaintLayerPaintingCompositingBackgroundPhase | PaintLayerPaintingCompositingForegroundPhase | PaintLayerPaintingCompositingMaskPhase)
PaintLayerPaintingCompositingBackgroundPhase 2057 Source/core/rendering/RenderLayer.cpp     bool isPaintingCompositedBackground = paintFlags & PaintLayerPaintingCompositingBackgroundPhase;
PaintLayerPaintingCompositingBackgroundPhase 1894 Source/core/rendering/compositing/CompositedLayerMapping.cpp         paintFlags |= PaintLayerPaintingCompositingBackgroundPhase;