Stop passing NodeRenderingContext except in textRendererIsNeeded

Source/core/svg/SVGSVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@kde.org>
  *
  * 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 122 matching lines @@
     bool hasEmptyViewBox() const { return viewBoxIsValid() && viewBoxCurrentValue().isEmpty(); }
 
 private:
     SVGSVGElement(const QualifiedName&, Document&);
     virtual ~SVGSVGElement();
 
     virtual bool isSVGSVGElement() const OVERRIDE { return true; }
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
-    virtual bool rendererIsNeeded(const NodeRenderingContext&) OVERRIDE;
+    virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*);
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
     virtual void svgAttributeChanged(const QualifiedName&);
 
     virtual bool selfHasRelativeLengths() const;
 
     void inheritViewAttributes(SVGViewElement*);
@@ skipping 19 matching lines @@
 
     bool m_useCurrentView;
     SVGZoomAndPanType m_zoomAndPan;
     RefPtr<SMILTimeContainer> m_timeContainer;
     SVGPoint m_translation;
     RefPtr<SVGViewSpec> m_viewSpec;
 };
 
 inline SVGSVGElement* toSVGSVGElement(Node* node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->isSVGElement());
     ASSERT_WITH_SECURITY_IMPLICATION(!node || toSVGElement(node)->isSVGSVGElement());
     return static_cast<SVGSVGElement*>(node);
 }
 
+inline const SVGSVGElement* toSVGSVGElement(const Node* node)
+{
+    ASSERT_WITH_SECURITY_IMPLICATION(!node || toSVGElement(node)->isSVGSVGElement());
+    return static_cast<const SVGSVGElement*>(node);
+}
+
 } // namespace WebCore
 
 #endif