This CL clean up patch in SVGElements.

Source/core/svg/SVGTextPositioningElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 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 65 matching lines @@
         markForLayoutAndParentResourceInvalidation(layoutObject);
         return;
     }
 
     SVGTextContentElement::svgAttributeChanged(attrName);
 }
 
 SVGTextPositioningElement* SVGTextPositioningElement::elementFromRenderer(LayoutObject& layoutObject)
 {
     if (!layoutObject.isSVGText() && !layoutObject.isSVGInline())
-        return 0;
+        return nullptr;
 
     Node* node = layoutObject.node();
     ASSERT(node);
     ASSERT(node->isSVGElement());
 
     return isSVGTextPositioningElement(*node) ? toSVGTextPositioningElement(node) : 0;
 }
 
 }