SVGLangSpace interface should be removed

Source/core/svg/SVGTextContentElement.cpp

Index: Source/core/svg/SVGTextContentElement.cpp
diff --git a/Source/core/svg/SVGTextContentElement.cpp b/Source/core/svg/SVGTextContentElement.cpp
index a1901ab5dbbb5ab3b8968cea427e2a2264b154f7..046d6d4a1a4fbd622ba9350f0acf79c000560f6a 100644
--- a/Source/core/svg/SVGTextContentElement.cpp
+++ b/Source/core/svg/SVGTextContentElement.cpp
@@ -213,10 +213,13 @@ bool SVGTextContentElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
-        SVGLangSpace::addSupportedAttributes(supportedAttributes);
         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::lengthAdjustAttr);
         supportedAttributes.add(SVGNames::textLengthAttr);
+        QualifiedName spaceWithPrefix = XMLNames::spaceAttr;

[pdr., 2013/12/11 00:10:58]

Can you add namespacePrefix="XML" in xmlattrs.in to avoid having to do this? I'm
not sure if this will work, but it's worth a shot.

+        spaceWithPrefix.setPrefix(xmlAtom);
+        supportedAttributes.add(spaceWithPrefix);
+        supportedAttributes.add(XMLNames::spaceAttr);
     }
     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
 }
@@ -255,7 +258,6 @@ void SVGTextContentElement::parseAttribute(const QualifiedName& name, const Atom
     } else if (name == SVGNames::textLengthAttr) {
         m_textLength.value = SVGLength::construct(LengthModeOther, value, parseError, ForbidNegativeLengths);
     } else if (SVGExternalResourcesRequired::parseAttribute(name, value)) {
-    } else if (SVGLangSpace::parseAttribute(name, value)) {
     } else
         ASSERT_NOT_REACHED();