Remove isSupportedAttribute in svg

Source/core/svg/SVGClipPathElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  *
  * 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 26 matching lines @@
 DEFINE_TRACE(SVGClipPathElement)
 {
     visitor->trace(m_clipPathUnits);
     SVGGraphicsElement::trace(visitor);
 }
 
 DEFINE_NODE_FACTORY(SVGClipPathElement)
 
 void SVGClipPathElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (attrName != SVGNames::clipPathUnitsAttr) {
-        SVGGraphicsElement::svgAttributeChanged(attrName);
+    if (attrName == SVGNames::clipPathUnitsAttr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
+
+        LayoutSVGResourceContainer* renderer = toLayoutSVGResourceContainer(this->layoutObject());
+        if (renderer)
+            renderer->invalidateCacheAndMarkForLayout();
         return;
     }
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
-    LayoutSVGResourceContainer* renderer = toLayoutSVGResourceContainer(this->layoutObject());
-    if (renderer)
-        renderer->invalidateCacheAndMarkForLayout();
+    SVGGraphicsElement::svgAttributeChanged(attrName);
 }
 
 void SVGClipPathElement::childrenChanged(const ChildrenChange& change)
 {
     SVGGraphicsElement::childrenChanged(change);
 
     if (change.byParser)
         return;
 
     if (LayoutObject* object = layoutObject())
         object->setNeedsLayoutAndFullPaintInvalidation(LayoutInvalidationReason::ChildChanged);
 }
 
 LayoutObject* SVGClipPathElement::createLayoutObject(const ComputedStyle&)
 {
     return new LayoutSVGResourceClipper(this);
 }
 
 }