Remove duplicated headers from core/

Source/core/rendering/svg/RenderSVGResourceMasker.cpp

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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.
  */
 
 #include "config.h"
 
 #include "core/rendering/svg/RenderSVGResourceMasker.h"
 
-#include "core/platform/graphics/GraphicsContext.h"
 #include "core/platform/graphics/GraphicsContextStateSaver.h"
-#include "core/platform/graphics/ImageBuffer.h"
 #include "core/rendering/svg/RenderSVGResource.h"
 #include "core/rendering/svg/SVGRenderingContext.h"
 #include "core/svg/SVGElement.h"
-#include "core/svg/SVGMaskElement.h"
-#include "core/svg/SVGUnitTypes.h"
-#include "platform/geometry/FloatRect.h"
 #include "platform/graphics/DisplayList.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/UnusedParam.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 const RenderSVGResourceType RenderSVGResourceMasker::s_resourceType = MaskerResourceType;
 
 RenderSVGResourceMasker::RenderSVGResourceMasker(SVGMaskElement* node)
@@ skipping 145 matching lines @@
         transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
         transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
         maskRect = transform.mapRect(maskRect);
     }
 
     maskRect.intersect(maskBoundaries);
     return maskRect;
 }
 
 }