SVGLangSpace interface should be removed

Source/core/svg/SVGImageElement.cpp

Index: Source/core/svg/SVGImageElement.cpp
diff --git a/Source/core/svg/SVGImageElement.cpp b/Source/core/svg/SVGImageElement.cpp
index a1873f53875b12b167759b27658f3159d7958f8c..72e3008be73219e351400497461f43dd872bac00 100644
--- a/Source/core/svg/SVGImageElement.cpp
+++ b/Source/core/svg/SVGImageElement.cpp
@@ -85,7 +85,6 @@ bool SVGImageElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
-        SVGLangSpace::addSupportedAttributes(supportedAttributes);
         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
         SVGURIReference::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::xAttr);
@@ -132,8 +131,7 @@ void SVGImageElement::parseAttribute(const QualifiedName& name, const AtomicStri
         setWidthBaseValue(SVGLength::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
     else if (name == SVGNames::heightAttr)
         setHeightBaseValue(SVGLength::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
-    else if (SVGLangSpace::parseAttribute(name, value)
-             || SVGExternalResourcesRequired::parseAttribute(name, value)
+    else if (SVGExternalResourcesRequired::parseAttribute(name, value)
              || SVGURIReference::parseAttribute(name, value)) {
     } else
         ASSERT_NOT_REACHED();
@@ -174,7 +172,6 @@ void SVGImageElement::svgAttributeChanged(const QualifiedName& attrName)
     }
 
     if (attrName == SVGNames::preserveAspectRatioAttr
-        || SVGLangSpace::isKnownAttribute(attrName)
         || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
         return;