Vector stores Expression object as OwnPtr instead of raw pointer in XPath.

Source/core/xml/XPathParser.h

 /*
  * Copyright 2005 Maksim Orlovich <maksim@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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 61 matching lines @@
 
     Expression* m_topExpr;
     bool m_gotNamespaceError;
 
     void registerParseNode(ParseNode*);
     void unregisterParseNode(ParseNode*);
 
     void registerPredicateVector(Vector<Predicate*>*);
     void deletePredicateVector(Vector<Predicate*>*);
 
-    void registerExpressionVector(Vector<Expression*>*);
-    void deleteExpressionVector(Vector<Expression*>*);
+    void registerExpressionVector(Vector<OwnPtr<Expression> >*);
+    void deleteExpressionVector(Vector<OwnPtr<Expression> >*);
 
     void registerString(String*);
     void deleteString(String*);
 
     void registerNodeTest(Step::NodeTest*);
     void deleteNodeTest(Step::NodeTest*);
 
 private:
     bool isBinaryOperatorContext() const;
 
@@ skipping 16 matching lines @@
 
     static Parser* currentParser;
 
     unsigned m_nextPos;
     String m_data;
     int m_lastTokenType;
     RefPtr<XPathNSResolver> m_resolver;
 
     HashSet<ParseNode*> m_parseNodes;
     HashSet<Vector<Predicate*>*> m_predicateVectors;
-    HashSet<Vector<Expression*>*> m_expressionVectors;
+    HashSet<Vector<OwnPtr<Expression> >*> m_expressionVectors;
     HashSet<String*> m_strings;
     HashSet<Step::NodeTest*> m_nodeTests;
 };
 
 } // XPath
 
 } // WebCore
 
 #endif