Make RenderObject::style() return a const object

Source/core/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012 University of Szeged
  * Copyright (C) 2012 Renata Hodovan <reni@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 394 matching lines @@
 
     m_targetElementInstance = toSVGElement(shadowTreeRootElement->firstChild());
     transferUseWidthAndHeightIfNeeded(*this, m_targetElementInstance.get(), *m_targetElementInstance->correspondingElement());
 
     ASSERT(m_targetElementInstance->parentNode() == shadowTreeRootElement);
 
     // Update relative length information.
     updateRelativeLengthsInformation();
 }
 
-RenderObject* SVGUseElement::createRenderer(RenderStyle*)
+RenderObject* SVGUseElement::createRenderer(const RenderStyle*)
 {
     return new RenderSVGTransformableContainer(this);
 }
 
 static bool isDirectReference(const SVGElement& element)
 {
     return isSVGPathElement(element)
         || isSVGRectElement(element)
         || isSVGCircleElement(element)
         || isSVGEllipseElement(element)
@@ skipping 329 matching lines @@
 
     if (m_resource)
         m_resource->removeClient(this);
 
     m_resource = resource;
     if (m_resource)
         m_resource->addClient(this);
 }
 
 }