Update SelectorQuery constructor to adopt CSSSelectorList object

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 447 matching lines @@
             collectElementsByTagName<SelectorQueryTrait>(rootNode, firstSelector.tagQName(), output);
             return;
         default:
             break; // If we need another fast path, add here.
         }
     }
 
     findTraverseRootsAndExecute<SelectorQueryTrait>(rootNode, output);
 }
 
-SelectorQuery::SelectorQuery(const CSSSelectorList& selectorList)
-    : m_selectorList(selectorList)
+PassOwnPtr<SelectorQuery> SelectorQuery::adopt(CSSSelectorList& selectorList)
 {
+    return adoptPtr(new SelectorQuery(selectorList));
+}
+
+SelectorQuery::SelectorQuery(CSSSelectorList& selectorList)
+{
+    m_selectorList.adopt(selectorList);
     m_selectors.initialize(m_selectorList);
 }
 
 bool SelectorQuery::matches(Element& element) const
 {
     return m_selectors.matches(element);
 }
 
 PassRefPtrWillBeRawPtr<NodeList> SelectorQuery::queryAll(ContainerNode& rootNode) const
 {
@@ skipping 23 matching lines @@
     // throw a NamespaceError if the selector includes any namespace prefixes.
     if (selectorList.selectorsNeedNamespaceResolution()) {
         exceptionState.throwDOMException(NamespaceError, "'" + selectors + "' contains namespaces, which are not supported.");
         return 0;
     }
 
     const unsigned maximumSelectorQueryCacheSize = 256;
     if (m_entries.size() == maximumSelectorQueryCacheSize)
         m_entries.remove(m_entries.begin());
 
-    OwnPtr<SelectorQuery> selectorQuery = adoptPtr(new SelectorQuery(selectorList));
-    SelectorQuery* rawSelectorQuery = selectorQuery.get();
-    m_entries.add(selectors, selectorQuery.release());
-    return rawSelectorQuery;
+    return m_entries.add(selectors, SelectorQuery::adopt(selectorList)).storedValue->value.get();
 }
 
 void SelectorQueryCache::invalidate()
 {
     m_entries.clear();
 }
 
 }