Remove isSupportedAttribute in svg

Source/core/svg/SVGGraphicsElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 169 matching lines @@
     if (hasSVGRareData())
         return *svgRareData()->animateMotionTransform() * matrix;
     return matrix;
 }
 
 AffineTransform* SVGGraphicsElement::animateMotionTransform()
 {
     return ensureSVGRareData()->animateMotionTransform();
 }
 
-bool SVGGraphicsElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        SVGTests::addSupportedAttributes(supportedAttributes);
-        supportedAttributes.add(SVGNames::transformAttr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGGraphicsElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGElement::svgAttributeChanged(attrName);
-        return;
-    }
-
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
     // Reattach so the isValid() check will be run again during renderer creation.
     if (SVGTests::isKnownAttribute(attrName)) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
         lazyReattachIfAttached();
         return;
     }
 
-    LayoutObject* object = layoutObject();
-    if (!object)
-        return;
+    if (attrName == SVGNames::transformAttr) {
+        LayoutObject* object = layoutObject();
+        if (!object)
+            return;
 
-    if (attrName == SVGNames::transformAttr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
         object->setNeedsTransformUpdate();
         markForLayoutAndParentResourceInvalidation(object);
         return;
     }
 
-    ASSERT_NOT_REACHED();
+    SVGElement::svgAttributeChanged(attrName);
 }
 
 SVGElement* SVGGraphicsElement::nearestViewportElement() const
 {
     for (Element* current = parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
         if (isViewportElement(*current))
             return toSVGElement(current);
     }
 
     return 0;
@@ skipping 31 matching lines @@
     return new LayoutSVGPath(this);
 }
 
 void SVGGraphicsElement::toClipPath(Path& path)
 {
     updatePathFromGraphicsElement(this, path);
     path.transform(calculateAnimatedLocalTransform());
 }
 
 }