Don't include ComputedStyle.h where not needed.

third_party/WebKit/Source/core/svg/SVGElementRareData.h

 /*
  * Copyright (C) Research In Motion Limited 2010. 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 SVGElementRareData_h
 #define SVGElementRareData_h
 
+#include "core/style/ComputedStyle.h"
 #include "core/svg/SVGElement.h"
 #include "platform/heap/Handle.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/StdLibExtras.h"
 
 namespace blink {
 
 class CSSCursorImageValue;
@@ skipping 104 matching lines @@
   HashSet<const QualifiedName*> m_webAnimatedAttributes;
   Member<MutableStylePropertySet> m_animatedSMILStyleProperties;
   RefPtr<ComputedStyle> m_overrideComputedStyle;
   // Used by <animateMotion>
   AffineTransform m_animateMotionTransform;
 };
 
 }  // namespace blink
 
 #endif