Get rid of unnecessary isChildNodeList() virtual call in clearChildNodeListCache()

Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 1297 matching lines @@
     }
 
     // The + selector. We need to invalidate the first element following the change. It is the only possible element
     // that could be affected by this DOM change.
     if (childrenAffectedByDirectAdjacentRules() && nodeAfterChange) {
         if (Element* elementAfterChange = nodeAfterChange->isElementNode() ? toElement(nodeAfterChange) : ElementTraversal::nextSibling(*nodeAfterChange))
             elementAfterChange->setNeedsStyleRecalc(SubtreeStyleChange);
     }
 }
 
+void ContainerNode::invalidateNodeListCachesInAncestors(const QualifiedName* attrName, Element* attributeOwnerElement)
+{
+    if (hasRareData() && (!attrName || isAttributeNode())) {
+        if (NodeListsNodeData* lists = rareData()->nodeLists())
+            lists->clearChildNodeListCache();
+    }
+
+    // Modifications to attributes that are not associated with an Element can't invalidate NodeList caches.
+    if (attrName && !attributeOwnerElement)
+        return;
+
+    if (!document().shouldInvalidateNodeListCaches(attrName))
+        return;
+
+    document().invalidateNodeListCaches(attrName);
+
+    for (ContainerNode* node = this; node; node = node->parentNode()) {
+        if (NodeListsNodeData* lists = node->nodeLists())
+            lists->invalidateCaches(attrName);
+    }
+}
+
 PassRefPtrWillBeRawPtr<TagCollection> ContainerNode::getElementsByTagName(const AtomicString& localName)
 {
     if (localName.isNull())
         return nullptr;
 
     if (document().isHTMLDocument())
         return ensureRareData().ensureNodeLists().addCache<HTMLTagCollection>(*this, HTMLTagCollectionType, localName);
     return ensureRareData().ensureNodeLists().addCache<TagCollection>(*this, TagCollectionType, localName);
 }
 
@@ skipping 59 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace blink