Enable Oilpan for core/clipboard/

Source/core/clipboard/DataTransferItem.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class Blob;
 class DataObjectItem;
 class DataTransfer;
 class StringCallback;
 class ExecutionContext;
 
-class CORE_EXPORT DataTransferItem final : public RefCountedWillBeGarbageCollected<DataTransferItem>, public ScriptWrappable {
-    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DataTransferItem);
+class CORE_EXPORT DataTransferItem final : public GarbageCollected<DataTransferItem>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(DataTransferItem);
 public:
-    static PassRefPtrWillBeRawPtr<DataTransferItem> create(PassRefPtrWillBeRawPtr<DataTransfer>, PassRefPtrWillBeRawPtr<DataObjectItem>);
+    static DataTransferItem* create(DataTransfer*, DataObjectItem*);
 
     String kind() const;
     String type() const;
 
     void getAsString(ExecutionContext*, StringCallback*) const;
     Blob* getAsFile() const;
 
     DataTransfer* dataTransfer() { return m_dataTransfer.get(); }
     DataObjectItem* dataObjectItem() { return m_item.get(); }
 
     DECLARE_TRACE();
 
 private:
-    DataTransferItem(PassRefPtrWillBeRawPtr<DataTransfer>, PassRefPtrWillBeRawPtr<DataObjectItem>);
+    DataTransferItem(DataTransfer*, DataObjectItem*);
 
-    RefPtrWillBeMember<DataTransfer> m_dataTransfer;
-    RefPtrWillBeMember<DataObjectItem> m_item;
+    Member<DataTransfer> m_dataTransfer;
+    Member<DataObjectItem> m_item;
 };
 
 } // namespace blink
 
 #endif // DataTransferItem_h