Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/core/clipboard/DataTransferItemList.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 29 matching lines @@
 namespace WebCore {
 
 class DataObject;
 class Clipboard;
 class DataTransferItem;
 class File;
 
 class ExceptionState;
 
 class DataTransferItemList : public RefCountedWillBeGarbageCollectedFinalized<DataTransferItemList>, public ScriptWrappable {
-    DECLARE_GC_INFO;
 public:
     static PassRefPtrWillBeRawPtr<DataTransferItemList> create(PassRefPtrWillBeRawPtr<Clipboard>, PassRefPtrWillBeRawPtr<DataObject>);
     ~DataTransferItemList();
 
     size_t length() const;
     PassRefPtrWillBeRawPtr<DataTransferItem> item(unsigned long index);
     void deleteItem(unsigned long index, ExceptionState&);
     void clear();
     PassRefPtrWillBeRawPtr<DataTransferItem> add(const String& data, const String& type, ExceptionState&);
     PassRefPtrWillBeRawPtr<DataTransferItem> add(PassRefPtr<File>);
 
     void trace(Visitor*);
 
 private:
     DataTransferItemList(PassRefPtrWillBeRawPtr<Clipboard>, PassRefPtrWillBeRawPtr<DataObject>);
 
     RefPtrWillBeMember<Clipboard> m_clipboard;
     RefPtrWillBeMember<DataObject> m_dataObject;
 };
 
 } // namespace WebCore
 
 #endif // DataTransferItemList_h