Make SelectorChecker::tagMatches internal to the SelectorChecker

Source/core/dom/SelectorQuery.cpp

 /*
  * Copyright (C) 2011, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 161 matching lines @@
             if (SelectorQueryTrait::shouldOnlyMatchFirstElement)
                 return;
         }
     }
 }
 
 template <typename SelectorQueryTrait>
 void SelectorDataList::collectElementsByTagName(ContainerNode& rootNode, const QualifiedName& tagName,  typename SelectorQueryTrait::OutputType& output) const
 {
     for (Element& element : ElementTraversal::descendantsOf(rootNode)) {
-        if (SelectorChecker::tagMatches(element, tagName)) {
+        // querySelector*() doesn't allow namespaces and throws before it gets
+        // here so we can ignore them.
+        ASSERT(tagName.namespaceURI() == starAtom);
+        if (tagName == anyQName() || element.hasLocalName(tagName.localName())) {
             SelectorQueryTrait::appendElement(output, element);
             if (SelectorQueryTrait::shouldOnlyMatchFirstElement)
                 return;
         }
     }
 }
 
 inline bool SelectorDataList::canUseFastQuery(const ContainerNode& rootNode) const
 {
     return m_selectors.size() == 1 && !m_crossesTreeBoundary && rootNode.inDocument() && !rootNode.document().inQuirksMode();
@@ skipping 342 matching lines @@
 
     return m_entries.add(selectors, SelectorQuery::adopt(selectorList)).storedValue->value.get();
 }
 
 void SelectorQueryCache::invalidate()
 {
     m_entries.clear();
 }
 
 }