MaskLuminance    1306 Source/core/css/CSSComputedStyleDeclaration.cpp     case MaskLuminance:
MaskLuminance     287 Source/core/css/resolver/CSSToStyleMap.cpp         type = MaskLuminance;
MaskLuminance     706 Source/core/rendering/RenderBoxModelObject.cpp             if (bgLayer->maskSourceType() == MaskLuminance)