Enable Oilpan for core/xml/

Source/core/xml/DocumentXPathEvaluator.h

Index: Source/core/xml/DocumentXPathEvaluator.h
diff --git a/Source/core/xml/DocumentXPathEvaluator.h b/Source/core/xml/DocumentXPathEvaluator.h
index ff713ff7a08ecb00562b4a0fd7b9ffa1e919f677..58819385e0cde3a0b8be9b100069de49bfb24530 100644
--- a/Source/core/xml/DocumentXPathEvaluator.h
+++ b/Source/core/xml/DocumentXPathEvaluator.h
@@ -41,11 +41,11 @@ class DocumentXPathEvaluator final : public NoBaseWillBeGarbageCollected<Documen
 public:
     static DocumentXPathEvaluator& from(DocumentSupplementable&);
 
-    static PassRefPtrWillBeRawPtr<XPathExpression> createExpression(DocumentSupplementable&,
-        const String& expression, PassRefPtrWillBeRawPtr<XPathNSResolver>, ExceptionState&);
-    static PassRefPtrWillBeRawPtr<XPathNSResolver> createNSResolver(DocumentSupplementable&, Node* nodeResolver);
-    static PassRefPtrWillBeRawPtr<XPathResult> evaluate(DocumentSupplementable&,
-        const String& expression, Node* contextNode, PassRefPtrWillBeRawPtr<XPathNSResolver>,
+    static XPathExpression* createExpression(DocumentSupplementable&,
+        const String& expression, XPathNSResolver*, ExceptionState&);
+    static XPathNSResolver* createNSResolver(DocumentSupplementable&, Node* nodeResolver);
+    static XPathResult* evaluate(DocumentSupplementable&,
+        const String& expression, Node* contextNode, XPathNSResolver*,
         unsigned short type, XPathResult*, ExceptionState&);
 
     virtual void trace(Visitor*) override;
@@ -55,7 +55,7 @@ private:
 
     static const char* supplementName() { return "DocumentXPathEvaluator"; }
 
-    RefPtrWillBeMember<XPathEvaluator> m_xpathEvaluator;
+    PersistentWillBeMember<XPathEvaluator> m_xpathEvaluator;
 };
 
 } // namespace blink