Fix selector namespace prefix resolution.

third_party/WebKit/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 529 matching lines @@
 {
     return m_selectors.queryFirst(rootNode);
 }
 
 SelectorQuery* SelectorQueryCache::add(const AtomicString& selectors, const Document& document, ExceptionState& exceptionState)
 {
     HashMap<AtomicString, OwnPtr<SelectorQuery>>::iterator it = m_entries.find(selectors);
     if (it != m_entries.end())
         return it->value.get();
 
-    CSSSelectorList selectorList = CSSParser::parseSelector(CSSParserContext(document, nullptr), selectors);
+    CSSSelectorList selectorList = CSSParser::parseSelector(CSSParserContext(document, nullptr), nullptr, selectors);
 
     if (!selectorList.first()) {
         exceptionState.throwDOMException(SyntaxError, "'" + selectors + "' is not a valid selector.");
         return nullptr;
     }
 
-    // throw a NamespaceError if the selector includes any namespace prefixes.
-    if (selectorList.selectorsNeedNamespaceResolution()) {
-        exceptionState.throwDOMException(NamespaceError, "'" + selectors + "' contains namespaces, which are not supported.");
-        return nullptr;
-    }
-
     const unsigned maximumSelectorQueryCacheSize = 256;
     if (m_entries.size() == maximumSelectorQueryCacheSize)
         m_entries.remove(m_entries.begin());
 
     return m_entries.add(selectors, SelectorQuery::adopt(std::move(selectorList))).storedValue->value.get();
 }
 
 void SelectorQueryCache::invalidate()
 {
     m_entries.clear();
 }
 
 }