blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/clipboard/DataTransfer.h

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 26 matching lines @@
 namespace blink {
 
 class DataObject;
 class DataTransferItemList;
 class DragImage;
 class Element;
 class FileList;
 class FrameSelection;
 class LocalFrame;
 class Node;
-class Range;
 
 // Used for drag and drop and copy/paste.
 // Drag and Drop:
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html
 // Clipboard API (copy/paste):
 // http://dev.w3.org/2006/webapi/clipops/clipops.html
 class CORE_EXPORT DataTransfer final
     : public GarbageCollectedFinalized<DataTransfer>,
       public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
@@ skipping 88 matching lines @@
   Member<Node> m_dragImageElement;
 };
 
 DragOperation convertDropZoneOperationToDragOperation(
     const String& dragOperation);
 String convertDragOperationToDropZoneOperation(DragOperation);
 
 }  // namespace blink
 
 #endif  // DataTransfer_h