Refactor WebCore::DragImage.

Source/core/dom/Clipboard.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 13 matching lines @@
 #ifndef Clipboard_h
 #define Clipboard_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ClipboardAccessPolicy.h"
 #include "core/dom/Node.h"
 #include "core/loader/cache/CachedResourceHandle.h"
 #include "core/page/DragActions.h"
 #include "core/platform/DragImage.h"
 #include "core/platform/graphics/IntPoint.h"
+#include "wtf/Forward.h"
 
 namespace WebCore {
 
+class CachedImage;
 class DataTransferItemList;
 class DragData;
+class DragImage;
 class FileList;
 class Frame;
+class Range;
 
 // State available during IE's events for drag and drop and copy/paste
 class Clipboard : public RefCounted<Clipboard>, public ScriptWrappable {
 public:
     // Whether this clipboard is serving a drag-drop or copy-paste request.
     enum ClipboardType {
         CopyAndPaste,
         DragAndDrop,
     };
 
@@ skipping 18 matching lines @@
     // extensions beyond IE's API
     virtual ListHashSet<String> types() const = 0;
     virtual PassRefPtr<FileList> files() const = 0;
 
     IntPoint dragLocation() const { return m_dragLoc; }
     CachedImage* dragImage() const { return m_dragImage.get(); }
     virtual void setDragImage(CachedImage*, const IntPoint&) = 0;
     Node* dragImageElement() const { return m_dragImageElement.get(); }
     virtual void setDragImageElement(Node*, const IntPoint&) = 0;
 
-    virtual DragImageRef createDragImage(IntPoint& dragLocation) const = 0;
+    virtual PassOwnPtr<DragImage> createDragImage(IntPoint& dragLocation) const = 0;
     virtual void declareAndWriteDragImage(Element*, const KURL&, const String& title, Frame*) = 0;
     virtual void writeURL(const KURL&, const String&, Frame*) = 0;
     virtual void writeRange(Range*, Frame*) = 0;
     virtual void writePlainText(const String&) = 0;
 
     virtual bool hasData() = 0;
 
     void setAccessPolicy(ClipboardAccessPolicy);
     bool canReadTypes() const;
     bool canReadData() const;
@@ skipping 36 matching lines @@
     CachedResourceHandle<CachedImage> m_dragImage;
     RefPtr<Node> m_dragImageElement;
 };
 
 DragOperation convertDropZoneOperationToDragOperation(const String& dragOperation);
 String convertDragOperationToDropZoneOperation(DragOperation);
 
 } // namespace WebCore
 
 #endif // Clipboard_h