Remove isSupportedAttribute in svg

Source/core/svg/SVGComponentTransferFunctionElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 55 matching lines @@
     visitor->trace(m_tableValues);
     visitor->trace(m_slope);
     visitor->trace(m_intercept);
     visitor->trace(m_amplitude);
     visitor->trace(m_exponent);
     visitor->trace(m_offset);
     visitor->trace(m_type);
     SVGElement::trace(visitor);
 }
 
-bool SVGComponentTransferFunctionElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        supportedAttributes.add(SVGNames::typeAttr);
-        supportedAttributes.add(SVGNames::tableValuesAttr);
-        supportedAttributes.add(SVGNames::slopeAttr);
-        supportedAttributes.add(SVGNames::interceptAttr);
-        supportedAttributes.add(SVGNames::amplitudeAttr);
-        supportedAttributes.add(SVGNames::exponentAttr);
-        supportedAttributes.add(SVGNames::offsetAttr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGComponentTransferFunctionElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGElement::svgAttributeChanged(attrName);
+    if (attrName == SVGNames::typeAttr || attrName == SVGNames::tableValuesAttr
+        || attrName == SVGNames::slopeAttr || attrName == SVGNames::interceptAttr
+        || attrName == SVGNames::amplitudeAttr || attrName == SVGNames::exponentAttr
+        || attrName == SVGNames::offsetAttr) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
+
+        invalidateFilterPrimitiveParent(this);
         return;
     }
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
-    invalidateFilterPrimitiveParent(this);
+    SVGElement::svgAttributeChanged(attrName);
 }
 
 ComponentTransferFunction SVGComponentTransferFunctionElement::transferFunction() const
 {
     ComponentTransferFunction func;
     func.type = m_type->currentValue()->enumValue();
     func.slope = m_slope->currentValue()->value();
     func.intercept = m_intercept->currentValue()->value();
     func.amplitude = m_amplitude->currentValue()->value();
     func.exponent = m_exponent->currentValue()->value();
     func.offset = m_offset->currentValue()->value();
     func.tableValues = m_tableValues->currentValue()->toFloatVector();
     return func;
 }
 
 } // namespace blink