Make RenderObject::style() return a const object

Source/core/rendering/svg/RenderSVGRoot.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 222 matching lines @@
         setNeedsBoundariesUpdate();
     if (diff.needsPaintInvalidation()) {
         // Box decorations may have appeared/disappeared - recompute status.
         m_hasBoxDecorationBackground = calculateHasBoxDecorations();
     }
 
     RenderReplaced::styleDidChange(diff, oldStyle);
     SVGResourcesCache::clientStyleChanged(this, diff, style());
 }
 
-bool RenderSVGRoot::isChildAllowed(RenderObject* child, RenderStyle*) const
+bool RenderSVGRoot::isChildAllowed(RenderObject* child, const RenderStyle*) const
 {
     return child->isSVG() && !(child->isSVGInline() || child->isSVGInlineText());
 }
 
 void RenderSVGRoot::addChild(RenderObject* child, RenderObject* beforeChild)
 {
     RenderReplaced::addChild(child, beforeChild);
     SVGResourcesCache::clientWasAddedToTree(child, child->style());
 
     bool shouldIsolateDescendants = (child->isBlendingAllowed() && child->style()->hasBlendMode()) || child->hasNonIsolatedBlendingDescendants();
@@ skipping 177 matching lines @@
             updateHitTestResult(result, pointInBorderBox);
             if (!result.addNodeToRectBasedTestResult(node(), request, locationInContainer, boundsRect))
                 return true;
         }
     }
 
     return false;
 }
 
 }