Make RenderObject::style() return a const object

Source/core/svg/SVGPatternElement.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 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.
  *
@@ skipping 107 matching lines @@
 {
     SVGElement::childrenChanged(change);
 
     if (change.byParser)
         return;
 
     if (RenderObject* object = renderer())
         object->setNeedsLayoutAndFullPaintInvalidation();
 }
 
-RenderObject* SVGPatternElement::createRenderer(RenderStyle*)
+RenderObject* SVGPatternElement::createRenderer(const RenderStyle*)
 {
     return new RenderSVGResourcePattern(this);
 }
 
 static void setPatternAttributes(const SVGPatternElement* element, PatternAttributes& attributes)
 {
     if (!attributes.hasX() && element->x()->isSpecified())
         attributes.setX(element->x()->currentValue());
 
     if (!attributes.hasY() && element->y()->isSpecified())
@@ skipping 61 matching lines @@
 
 bool SVGPatternElement::selfHasRelativeLengths() const
 {
     return m_x->currentValue()->isRelative()
         || m_y->currentValue()->isRelative()
         || m_width->currentValue()->isRelative()
         || m_height->currentValue()->isRelative();
 }
 
 } // namespace blink