Make SVGTextPositioningElement::elementFromRenderer take a reference

Source/core/svg/SVGTextPositioningElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 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 13 matching lines @@
 #include "core/SVGNames.h"
 #include "core/svg/SVGAnimatedLengthList.h"
 #include "core/svg/SVGAnimatedNumberList.h"
 #include "core/svg/SVGTextContentElement.h"
 
 namespace blink {
 
 class SVGTextPositioningElement : public SVGTextContentElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static SVGTextPositioningElement* elementFromRenderer(RenderObject*);
+    static SVGTextPositioningElement* elementFromRenderer(RenderObject&);
 
     SVGAnimatedLengthList* x() { return m_x.get(); }
     SVGAnimatedLengthList* y() { return m_y.get(); }
     SVGAnimatedLengthList* dx() { return m_dx.get(); }
     SVGAnimatedLengthList* dy() { return m_dy.get(); }
     SVGAnimatedNumberList* rotate() { return m_rotate.get(); }
 
 protected:
     SVGTextPositioningElement(const QualifiedName&, Document&);
 
@@ skipping 12 matching lines @@
 inline bool isSVGTextPositioningElement(const SVGElement& element)
 {
     return element.isTextPositioning();
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGTextPositioningElement);
 
 } // namespace blink
 
 #endif // SVGTextPositioningElement_h