createGradient    649 Source/core/css/CSSGradientValue.cpp PassRefPtr<Gradient> CSSLinearGradientValue::createGradient(const CSSToLengthConversionData& conversionData, const IntSize& size)
createGradient    993 Source/core/css/CSSGradientValue.cpp PassRefPtr<Gradient> CSSRadialGradientValue::createGradient(const CSSToLengthConversionData& conversionData, const IntSize& size)