Remove isSupportedAttribute in svg

Source/core/svg/SVGLinearGradientElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 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
@@ skipping 39 matching lines @@
 {
     visitor->trace(m_x1);
     visitor->trace(m_y1);
     visitor->trace(m_x2);
     visitor->trace(m_y2);
     SVGGradientElement::trace(visitor);
 }
 
 DEFINE_NODE_FACTORY(SVGLinearGradientElement)
 
-bool SVGLinearGradientElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        supportedAttributes.add(SVGNames::x1Attr);
-        supportedAttributes.add(SVGNames::x2Attr);
-        supportedAttributes.add(SVGNames::y1Attr);
-        supportedAttributes.add(SVGNames::y2Attr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGLinearGradientElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGGradientElement::svgAttributeChanged(attrName);
+    if (attrName == SVGNames::x1Attr || attrName == SVGNames::x2Attr
+        || attrName == SVGNames::y1Attr || attrName == SVGNames::y2Attr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
+
+        updateRelativeLengthsInformation();
+
+        LayoutSVGResourceContainer* renderer = toLayoutSVGResourceContainer(this->layoutObject());
+        if (renderer)
+            renderer->invalidateCacheAndMarkForLayout();
+
         return;
     }
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
-    updateRelativeLengthsInformation();
-
-    LayoutSVGResourceContainer* renderer = toLayoutSVGResourceContainer(this->layoutObject());
-    if (renderer)
-        renderer->invalidateCacheAndMarkForLayout();
+    SVGGradientElement::svgAttributeChanged(attrName);
 }
 
 LayoutObject* SVGLinearGradientElement::createLayoutObject(const ComputedStyle&)
 {
     return new LayoutSVGResourceLinearGradient(this);
 }
 
 static void setGradientAttributes(SVGGradientElement* element, LinearGradientAttributes& attributes, bool isLinear = true)
 {
     if (!attributes.hasSpreadMethod() && element->spreadMethod()->isSpecified())
@@ skipping 68 matching lines @@
 
 bool SVGLinearGradientElement::selfHasRelativeLengths() const
 {
     return m_x1->currentValue()->isRelative()
         || m_y1->currentValue()->isRelative()
         || m_x2->currentValue()->isRelative()
         || m_y2->currentValue()->isRelative();
 }
 
 } // namespace blink