Let SVGElement handle SVGLangSpace attributes parsing

Source/core/svg/SVGFilterElement.cpp

Index: Source/core/svg/SVGFilterElement.cpp
diff --git a/Source/core/svg/SVGFilterElement.cpp b/Source/core/svg/SVGFilterElement.cpp
index 0f2cbb38ec6d84e2577a29b8e69d59a1d92d56e7..a94441235836e68415ff67c618b667867eb15d30 100644
--- a/Source/core/svg/SVGFilterElement.cpp
+++ b/Source/core/svg/SVGFilterElement.cpp
@@ -105,7 +105,6 @@ bool SVGFilterElement::isSupportedAttribute(const QualifiedName& attrName)
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
         SVGURIReference::addSupportedAttributes(supportedAttributes);
-        SVGLangSpace::addSupportedAttributes(supportedAttributes);
         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::filterUnitsAttr);
         supportedAttributes.add(SVGNames::primitiveUnitsAttr);
@@ -147,7 +146,6 @@ void SVGFilterElement::parseAttribute(const QualifiedName& name, const AtomicStr
             setFilterResYBaseValue(y);
         }
     } else if (SVGURIReference::parseAttribute(name, value)
-             || SVGLangSpace::parseAttribute(name, value)
              || SVGExternalResourcesRequired::parseAttribute(name, value)) {
     } else
         ASSERT_NOT_REACHED();