Oilpan: Move WorkerClients to the managed heap and trace its supplements.

Source/core/clipboard/DataObject.h

 /*
  * Copyright (c) 2008, 2009, 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 40 matching lines @@
 // during a drag-n-drop operation. This is the data that WebCore is aware
 // of and is not specific to a platform.
 class DataObject : public RefCountedWillBeGarbageCollectedFinalized<DataObject>, public WillBeHeapSupplementable<DataObject> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DataObject);
 public:
     static PassRefPtrWillBeRawPtr<DataObject> createFromPasteboard(PasteMode);
     static PassRefPtrWillBeRawPtr<DataObject> create();
 
     PassRefPtrWillBeRawPtr<DataObject> copy() const;
 
+    virtual ~DataObject();
+
     // DataTransferItemList support.
     size_t length() const;
     PassRefPtrWillBeRawPtr<DataObjectItem> item(unsigned long index);
     // FIXME: Implement V8DataTransferItemList::indexedPropertyDeleter to get this called.
     void deleteItem(unsigned long index);
     void clearAll();
     // Returns null if an item already exists with the provided type.
     PassRefPtrWillBeRawPtr<DataObjectItem> add(const String& data, const String& type);
     PassRefPtrWillBeRawPtr<DataObjectItem> add(PassRefPtrWillBeRawPtr<File>);
 
@@ skipping 33 matching lines @@
 
     WillBeHeapVector<RefPtrWillBeMember<DataObjectItem> > m_itemList;
 
     // State of Shift/Ctrl/Alt/Meta keys.
     int m_modifierKeyState;
 };
 
 } // namespace WebCore
 
 #endif