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

Source/core/xml/XPathParser.cpp

Index: Source/core/xml/XPathParser.cpp
diff --git a/Source/core/xml/XPathParser.cpp b/Source/core/xml/XPathParser.cpp
index 2427539edb596ec65b1edab1f56e050e64a59612..332b8c3e730142ac889d41f8bfadfd9d3dfb297f 100644
--- a/Source/core/xml/XPathParser.cpp
+++ b/Source/core/xml/XPathParser.cpp
@@ -486,11 +486,9 @@ Expression* Parser::parseStatement(const String& statement, PassRefPtr<XPathNSRe
         }
         m_predicateVectors.clear();
 
-        HashSet<Vector<Expression*>*>::iterator eend = m_expressionVectors.end();
-        for (HashSet<Vector<Expression*>*>::iterator it = m_expressionVectors.begin(); it != eend; ++it) {
-            deleteAllValues(**it);
+        HashSet<Vector<OwnPtr<Expression> >*>::iterator eend = m_expressionVectors.end();
+        for (HashSet<Vector<OwnPtr<Expression> >*>::iterator it = m_expressionVectors.begin(); it != eend; ++it)
             delete *it;
-        }
         m_expressionVectors.clear();
 
         deleteAllValues(m_strings);
@@ -564,7 +562,7 @@ void Parser::deletePredicateVector(Vector<Predicate*>* vector)
 }
 
 
-void Parser::registerExpressionVector(Vector<Expression*>* vector)
+void Parser::registerExpressionVector(Vector<OwnPtr<Expression> >* vector)
 {
     if (vector == 0)
         return;
@@ -574,7 +572,7 @@ void Parser::registerExpressionVector(Vector<Expression*>* vector)
     m_expressionVectors.add(vector);
 }
 
-void Parser::deleteExpressionVector(Vector<Expression*>* vector)
+void Parser::deleteExpressionVector(Vector<OwnPtr<Expression> >* vector)
 {
     if (vector == 0)
         return;