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

Source/core/xml/XPathPath.h

 /*
  * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006, 2009 Apple 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 21 matching lines @@
 
 namespace WebCore {
 
     namespace XPath {
 
         class Predicate;
         class Step;
 
         class Filter : public Expression {
         public:
-            Filter(Expression*, const Vector<Predicate*>& = Vector<Predicate*>());
+            Filter(PassOwnPtr<Expression>, const Vector<Predicate*>& = Vector<Predicate*>());
             virtual ~Filter();
 
             virtual Value evaluate() const;
 
         private:
             virtual Value::Type resultType() const { return Value::NodeSetValue; }
 
-            Expression* m_expr;
-            Vector<Predicate*> m_predicates;
+            OwnPtr<Expression> m_expr;
+            Vector<OwnPtr<Predicate> > m_predicates;
         };
 
         class LocationPath : public Expression {
         public:
             LocationPath();
             virtual ~LocationPath();
             void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
 
             virtual Value evaluate() const;
             void evaluate(NodeSet& nodes) const; // nodes is an input/output parameter
@@ skipping 19 matching lines @@
             virtual Value::Type resultType() const { return Value::NodeSetValue; }
 
             Filter* m_filter;
             LocationPath* m_path;
         };
 
     }
 }
 
 #endif // XPath_Path_H