SVGLangSpace interface should be removed

Source/core/svg/SVGEllipseElement.cpp

Index: Source/core/svg/SVGEllipseElement.cpp
diff --git a/Source/core/svg/SVGEllipseElement.cpp b/Source/core/svg/SVGEllipseElement.cpp
index f5046eb440e130f7184856a5f87f3d6fb8161039..b0e4aeda679e8f7c036459811eadc23a013e58fd 100644
--- a/Source/core/svg/SVGEllipseElement.cpp
+++ b/Source/core/svg/SVGEllipseElement.cpp
@@ -65,7 +65,6 @@ bool SVGEllipseElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
-        SVGLangSpace::addSupportedAttributes(supportedAttributes);
         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::cxAttr);
         supportedAttributes.add(SVGNames::cyAttr);
@@ -89,8 +88,7 @@ void SVGEllipseElement::parseAttribute(const QualifiedName& name, const AtomicSt
         setRxBaseValue(SVGLength::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
     else if (name == SVGNames::ryAttr)
         setRyBaseValue(SVGLength::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
-    else if (SVGLangSpace::parseAttribute(name, value)
-             || SVGExternalResourcesRequired::parseAttribute(name, value)) {
+    else if (SVGExternalResourcesRequired::parseAttribute(name, value)) {
     } else
         ASSERT_NOT_REACHED();
 
@@ -124,7 +122,7 @@ void SVGEllipseElement::svgAttributeChanged(const QualifiedName& attrName)
         return;
     }
 
-    if (SVGLangSpace::isKnownAttribute(attrName) || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
+    if (SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
         return;
     }