Reduce number of header includes in SVG

Source/core/svg/SVGAnimateElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGAnimateElement_h
 #define SVGAnimateElement_h
 
-#include "core/svg/SVGAnimatedType.h"
-#include "core/svg/SVGAnimatedTypeAnimator.h"
 #include "core/svg/SVGAnimationElement.h"
 #include <wtf/OwnPtr.h>
 
 namespace WebCore {
     
 class SVGAnimatedProperty;
+class SVGAnimatedType;
+class SVGAnimatedTypeAnimator;
 
 class SVGAnimateElement : public SVGAnimationElement {
 public:
     static PassRefPtr<SVGAnimateElement> create(const QualifiedName&, Document*);
     virtual ~SVGAnimateElement();
 
     AnimatedPropertyType determineAnimatedPropertyType(SVGElement*) const;
     
 protected:
     SVGAnimateElement(const QualifiedName&, Document*);
@@ skipping 25 matching lines @@
     OwnPtr<SVGAnimatedType> m_toAtEndOfDurationType;
     OwnPtr<SVGAnimatedType> m_animatedType;
 
     SVGElementAnimatedPropertyList m_animatedProperties;
     OwnPtr<SVGAnimatedTypeAnimator> m_animator;
 };
 
 } // namespace WebCore
 
 #endif // SVGAnimateElement_h