Make RenderObject::style() return a const object

Source/core/svg/SVGTextPathElement.cpp

 /*
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com>
  *
  * 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,
@@ skipping 98 matching lines @@
         return;
     }
 
     if (attrName == SVGNames::startOffsetAttr)
         updateRelativeLengthsInformation();
 
     if (RenderObject* object = renderer())
         markForLayoutAndParentResourceInvalidation(object);
 }
 
-RenderObject* SVGTextPathElement::createRenderer(RenderStyle*)
+RenderObject* SVGTextPathElement::createRenderer(const RenderStyle*)
 {
     return new RenderSVGTextPath(this);
 }
 
 bool SVGTextPathElement::rendererIsNeeded(const RenderStyle& style)
 {
     if (parentNode() && (isSVGAElement(*parentNode()) || isSVGTextElement(*parentNode())))
         return Element::rendererIsNeeded(style);
 
     return false;
@@ skipping 37 matching lines @@
         clearResourceReferences();
 }
 
 bool SVGTextPathElement::selfHasRelativeLengths() const
 {
     return m_startOffset->currentValue()->isRelative()
         || SVGTextContentElement::selfHasRelativeLengths();
 }
 
 } // namespace blink