Reduce forward declarations in core/svg

Source/core/svg/graphics/filters/SVGFEImage.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2013 Google 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
@@ skipping 12 matching lines @@
 
 #ifndef SVGFEImage_h
 #define SVGFEImage_h
 
 #include "core/dom/TreeScope.h"
 #include "core/svg/SVGPreserveAspectRatio.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace WebCore {
 
-class Document;
 class Image;
 class RenderObject;
 
 class FEImage FINAL : public FilterEffect {
 public:
     static PassRefPtr<FEImage> createWithImage(Filter*, PassRefPtr<Image>, PassRefPtr<SVGPreserveAspectRatio>);
     static PassRefPtr<FEImage> createWithIRIReference(Filter*, TreeScope&, const String&, PassRefPtr<SVGPreserveAspectRatio>);
 
     virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) OVERRIDE;
 
@@ skipping 15 matching lines @@
 
     // m_treeScope will never be a dangling reference. See https://bugs.webkit.org/show_bug.cgi?id=99243
     TreeScope* m_treeScope;
     String m_href;
     PassRefPtr<SVGPreserveAspectRatio> m_preserveAspectRatio;
 };
 
 } // namespace WebCore
 
 #endif // SVGFEImage_h