This CL clean up patch in SVGElements.

Source/core/svg/SVGTextContentElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 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 236 matching lines @@
 {
     // Any element of the <text> subtree is advertized as using relative lengths.
     // On any window size change, we have to relayout the text subtree, as the
     // effective 'on-screen' font size may change.
     return true;
 }
 
 SVGTextContentElement* SVGTextContentElement::elementFromRenderer(LayoutObject* layoutObject)
 {
     if (!layoutObject)
-        return 0;
+        return nullptr;
 
     if (!layoutObject->isSVGText() && !layoutObject->isSVGInline())
-        return 0;
+        return nullptr;
 
     SVGElement* element = toSVGElement(layoutObject->node());
     ASSERT(element);
     return isSVGTextContentElement(*element) ? toSVGTextContentElement(element) : 0;
 }
 
 }