Remove isSupportedAttribute in svg

Source/core/svg/SVGCursorElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 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 31 matching lines @@
 
 SVGCursorElement::~SVGCursorElement()
 {
     // The below teardown is all handled by weak pointer processing in oilpan.
 #if !ENABLE(OILPAN)
     for (const auto& client : m_clients)
         client->cursorElementRemoved();
 #endif
 }
 
-bool SVGCursorElement::isSupportedAttribute(const QualifiedName& attrName)
-{
-    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
-    if (supportedAttributes.isEmpty()) {
-        SVGTests::addSupportedAttributes(supportedAttributes);
-        SVGURIReference::addSupportedAttributes(supportedAttributes);
-        supportedAttributes.add(SVGNames::xAttr);
-        supportedAttributes.add(SVGNames::yAttr);
-    }
-    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
-}
-
 void SVGCursorElement::addClient(SVGElement* element)
 {
     m_clients.add(element);
     element->setCursorElement(this);
 }
 
 #if !ENABLE(OILPAN)
 void SVGCursorElement::removeClient(SVGElement* element)
 {
     HashSet<RawPtr<SVGElement>>::iterator it = m_clients.find(element);
     if (it != m_clients.end()) {
         m_clients.remove(it);
         element->cursorElementRemoved();
     }
 }
 #endif
 
 void SVGCursorElement::removeReferencedElement(SVGElement* element)
 {
     m_clients.remove(element);
 }
 
 void SVGCursorElement::svgAttributeChanged(const QualifiedName& attrName)
 {
-    if (!isSupportedAttribute(attrName)) {
-        SVGElement::svgAttributeChanged(attrName);
+    if (attrName == SVGNames::xAttr || attrName == SVGNames::yAttr
+        || SVGTests::isKnownAttribute(attrName)
+        || SVGURIReference::isKnownAttribute(attrName)) {
+        SVGElement::InvalidationGuard invalidationGuard(this);
+
+        // Any change of a cursor specific attribute triggers this recalc.
+        for (const auto& client : m_clients)
+            client->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SVGCursor));
+
         return;
     }
 
-    SVGElement::InvalidationGuard invalidationGuard(this);
-
-    // Any change of a cursor specific attribute triggers this recalc.
-    for (const auto& client : m_clients)
-        client->setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::SVGCursor));
+    SVGElement::svgAttributeChanged(attrName);
 }
 
 DEFINE_TRACE(SVGCursorElement)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_x);
     visitor->trace(m_y);
     visitor->trace(m_clients);
 #endif
     SVGElement::trace(visitor);
     SVGTests::trace(visitor);
     SVGURIReference::trace(visitor);
 }
 
 } // namespace blink