Remove isSupportedAttribute in svg

Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * 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 45 matching lines @@
 DEFINE_TRACE(SVGFilterPrimitiveStandardAttributes)
 {
     visitor->trace(m_x);
     visitor->trace(m_y);
     visitor->trace(m_width);
     visitor->trace(m_height);
     visitor->trace(m_result);
     SVGElement::trace(visitor);
 }
 
-bool SVGFilterPrimitiveStandardAttributes::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        supportedAttributes.add(SVGNames::xAttr);
-        supportedAttributes.add(SVGNames::yAttr);
-        supportedAttributes.add(SVGNames::widthAttr);
-        supportedAttributes.add(SVGNames::heightAttr);
-        supportedAttributes.add(SVGNames::resultAttr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 bool SVGFilterPrimitiveStandardAttributes::setFilterEffectAttribute(FilterEffect*, const QualifiedName&)
 {
     // When all filters support this method, it will be changed to a pure virtual method.
     ASSERT_NOT_REACHED();
     return false;
 }
 
 void SVGFilterPrimitiveStandardAttributes::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGElement::svgAttributeChanged(attrName);
+    if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr
+        || attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr
+        || attrName == SVGNames::resultAttr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
+        invalidate();
         return;
     }
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
-    invalidate();
+    SVGElement::svgAttributeChanged(attrName);
 }
 
 void SVGFilterPrimitiveStandardAttributes::childrenChanged(const ChildrenChange& change)
 {
     SVGElement::childrenChanged(change);
 
     if (!change.byParser)
         invalidate();
 }
 
@@ skipping 49 matching lines @@
         return;
 
     LayoutObject* renderer = parent->layoutObject();
     if (!renderer || !renderer->isSVGResourceFilterPrimitive())
         return;
 
     LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(renderer, false);
 }
 
 }