Remove destructors from ScriptWrappable objects (part 1)

Source/core/clipboard/DataTransferItem.cpp

 /*
  * 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 21 matching lines @@
 #include "core/clipboard/DataTransferItem.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include "core/clipboard/DataObjectItem.h"
 #include "core/clipboard/DataTransfer.h"
 #include "core/dom/StringCallback.h"
 #include "wtf/StdLibExtras.h"
 
 namespace WebCore {
 
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DataTransferItem);
+
 PassRefPtrWillBeRawPtr<DataTransferItem> DataTransferItem::create(PassRefPtrWillBeRawPtr<DataTransfer> dataTransfer, PassRefPtrWillBeRawPtr<DataObjectItem> item)
 {
     return adoptRefWillBeNoop(new DataTransferItem(dataTransfer, item));
 }
 
-DataTransferItem::~DataTransferItem()
-{
-}
-
 String DataTransferItem::kind() const
 {
     DEFINE_STATIC_LOCAL(const String, kindString, ("string"));
     DEFINE_STATIC_LOCAL(const String, kindFile, ("file"));
     if (!m_dataTransfer->canReadTypes())
         return String();
     switch (m_item->kind()) {
     case DataObjectItem::StringKind:
         return kindString;
     case DataObjectItem::FileKind:
@@ skipping 36 matching lines @@
 }
 
 void DataTransferItem::trace(Visitor* visitor)
 {
     visitor->trace(m_dataTransfer);
     visitor->trace(m_item);
 }
 
 } // namespace WebCore