Reduce number of header includes in SVG

Source/core/svg/SVGAnimationElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Cameron McCormack <cam@mcc.id.au>
  * 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
@@ skipping 10 matching lines @@
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGAnimationElement_h
 #define SVGAnimationElement_h
 
 #include "core/platform/graphics/UnitBezier.h"
 #include "core/svg/SVGAnimatedBoolean.h"
 #include "core/svg/SVGExternalResourcesRequired.h"
-#include "core/svg/SVGStringList.h"
 #include "core/svg/SVGTests.h"
-#include "core/svg/animation/SMILTime.h"
 #include "core/svg/animation/SVGSMILElement.h"
 
 namespace WebCore {
 
 enum AnimationMode {
     NoAnimation,
     FromToAnimation,
     FromByAnimation,
     ToAnimation,
     ByAnimation,
@@ skipping 201 matching lines @@
     String m_lastValuesAnimationFrom;
     String m_lastValuesAnimationTo;
     bool m_hasInvalidCSSAttributeType;
     CalcMode m_calcMode;
     AnimationMode m_animationMode;
 };
 
 } // namespace WebCore
 
 #endif // SVGAnimationElement_h