Remove isSupportedAttribute in svg

Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp

Index: Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp
diff --git a/Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp b/Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp
index 7293ecf43a4e75c609691378cc65587319e167aa..3f9836f0290f24381f10bfb73420e5d69aa53686 100644
--- a/Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp
+++ b/Source/core/svg/SVGFilterPrimitiveStandardAttributes.cpp
@@ -63,19 +63,6 @@ DEFINE_TRACE(SVGFilterPrimitiveStandardAttributes)
     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.
@@ -85,13 +72,15 @@ bool SVGFilterPrimitiveStandardAttributes::setFilterEffectAttribute(FilterEffect
 
 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)