[svg2] Make SVGLength wrap a CSSPrimitiveValue

Source/core/svg/SVGAnimatedLength.cpp

Index: Source/core/svg/SVGAnimatedLength.cpp
diff --git a/Source/core/svg/SVGAnimatedLength.cpp b/Source/core/svg/SVGAnimatedLength.cpp
index ade7ec10472d24a5d78f0329af3ab220f9deaf7b..de2ff387eedd1f7a195942e5c4e8d69e9f8f1f2e 100644
--- a/Source/core/svg/SVGAnimatedLength.cpp
+++ b/Source/core/svg/SVGAnimatedLength.cpp
@@ -49,7 +49,7 @@ void SVGAnimatedLength::setBaseValueAsString(const String& value, SVGParsingErro
 
     if (es.hadException()) {
         parseError = ParsingAttributeFailedError;
-        baseValue()->newValueSpecifiedUnits(LengthTypeNumber, 0);
+        baseValue()->newValueSpecifiedUnits(CSSPrimitiveValue::CSS_NUMBER, 0);
     } else if (m_negativeValuesMode == ForbidNegativeLengths && baseValue()->valueInSpecifiedUnits() < 0) {
         parseError = NegativeValueForbiddenError;
     }