Enable Oilpan for core/xml/

Source/core/xml/XPathExpression.h

Index: Source/core/xml/XPathExpression.h
diff --git a/Source/core/xml/XPathExpression.h b/Source/core/xml/XPathExpression.h
index f33e1458b1ae89631d19165dd14419650e5cf628..dc6dd694caf847bad9e963cc06eb1b2ea5dfe405 100644
--- a/Source/core/xml/XPathExpression.h
+++ b/Source/core/xml/XPathExpression.h
@@ -44,24 +44,23 @@ namespace XPath {
 class Expression;
 }
 
-class XPathExpression : public RefCountedWillBeGarbageCollected<XPathExpression>, public ScriptWrappable {
-    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(XPathExpression);
+class XPathExpression : public GarbageCollected<XPathExpression>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<XPathExpression> create()
+    static XPathExpression* create()
     {
-        return adoptRefWillBeNoop(new XPathExpression);
+        return new XPathExpression;
     }
 
-    static PassRefPtrWillBeRawPtr<XPathExpression> createExpression(const String& expression, PassRefPtrWillBeRawPtr<XPathNSResolver>, ExceptionState&);
-    PassRefPtrWillBeRawPtr<XPathResult> evaluate(Node* contextNode, unsigned short type, XPathResult*, ExceptionState&);
+    static XPathExpression* createExpression(const String& expression, XPathNSResolver*, ExceptionState&);
+    XPathResult* evaluate(Node* contextNode, unsigned short type, XPathResult*, ExceptionState&);
 
     void trace(Visitor*);
 
 private:
     XPathExpression();
 
-    OwnPtrWillBeMember<XPath::Expression> m_topExpression;
+    Member<XPath::Expression> m_topExpression;
 };
 
 } // namespace blink