Refactor WebCore::DragImage.

Source/core/page/DragController.h

 /*
  * Copyright (C) 2007, 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 #ifndef DragController_h
 #define DragController_h
 
 #include "core/page/DragActions.h"
-#include "core/platform/DragImage.h"
 #include "core/platform/graphics/IntPoint.h"
 #include "weborigin/KURL.h"
+#include "wtf/Forward.h"
 
 namespace WebCore {
 
     class Clipboard;
     class Document;
     class DragClient;
     class DragData;
+    class DragImage;
     struct DragSession;
     struct DragState;
     class Element;
     class Frame;
     class FrameSelection;
     class HTMLInputElement;
     class Image;
     class IntRect;
     class Node;
     class Page;
     class PlatformMouseEvent;
     class Range;
-    
+
     class DragController {
         WTF_MAKE_NONCOPYABLE(DragController); WTF_MAKE_FAST_ALLOCATED;
     public:
         ~DragController();
 
         static PassOwnPtr<DragController> create(Page*, DragClient*);
 
         DragClient* client() const { return m_client; }
 
         DragSession dragEntered(DragData*);
@@ skipping 40 matching lines @@
         bool tryDocumentDrag(DragData*, DragDestinationAction, DragSession&);
         bool tryDHTMLDrag(DragData*, DragOperation&);
         DragOperation dragOperation(DragData*);
         void cancelDrag();
         bool dragIsMove(FrameSelection*, DragData*);
         bool isCopyKeyDown(DragData*);
 
         void mouseMovedIntoDocument(Document*);
 
         IntRect selectionDraggingRect(Frame*);
-        bool doDrag(Frame* src, Clipboard* clipboard, DragImageRef dragImage, const KURL& linkURL, const KURL& imageURL, Node* node, IntPoint& dragLoc, IntPoint& dragImageOffset);
+        bool doDrag(Frame* src, Clipboard*, DragImage*, const KURL& linkURL, const KURL& imageURL, Node*, IntPoint& dragLoc, IntPoint& dragImageOffset);
         void doImageDrag(Element*, const IntPoint&, const IntRect&, Clipboard*, Frame*, IntPoint&);
-        void doSystemDrag(DragImageRef, const IntPoint&, const IntPoint&, Clipboard*, Frame*, bool forLink);
+        void doSystemDrag(DragImage*, const IntPoint&, const IntPoint&, Clipboard*, Frame*, bool forLink);
         void cleanupAfterSystemDrag();
 
         Page* m_page;
         DragClient* m_client;
 
         RefPtr<Document> m_documentUnderMouse; // The document the mouse was last dragged over.
         RefPtr<Document> m_dragInitiator; // The Document (if any) that initiated the drag.
         RefPtr<HTMLInputElement> m_fileInputElementUnderMouse;
         bool m_documentIsHandlingDrag;
 
         DragDestinationAction m_dragDestinationAction;
         DragSourceAction m_dragSourceAction;
         bool m_didInitiateDrag;
         DragOperation m_sourceDragOperation; // Set in startDrag when a drag starts from a mouse down within WebKit
         IntPoint m_dragOffset;
         KURL m_draggingImageURL;
     };
 
 }
 
 #endif