Enable Oilpan for core/xml/

Source/core/xml/DOMParser.h

Index: Source/core/xml/DOMParser.h
diff --git a/Source/core/xml/DOMParser.h b/Source/core/xml/DOMParser.h
index b65395bbb24ab65fb4c81d1a47d781e12bbc21f9..7bee9e1607726d2cf438251a221a871e00b2676c 100644
--- a/Source/core/xml/DOMParser.h
+++ b/Source/core/xml/DOMParser.h
@@ -22,20 +22,18 @@
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
 
 namespace blink {
 
 class Document;
 class ExceptionState;
 
-class DOMParser final : public RefCountedWillBeGarbageCollected<DOMParser>, public ScriptWrappable {
+class DOMParser final : public GarbageCollected<DOMParser>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<DOMParser> create()
+    static DOMParser* create()
     {
-        return adoptRefWillBeNoop(new DOMParser);
+        return new DOMParser;
     }
 
     PassRefPtrWillBeRawPtr<Document> parseFromString(const String&, const String& contentType, ExceptionState&);