This CL clean up patch in SVGElements.

Source/core/svg/SVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2009, 2014 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 86 matching lines @@
 
     PassRefPtrWillBeRawPtr<SVGAnimatedPropertyBase> propertyFromAttribute(const QualifiedName& attributeName);
     static AnimatedPropertyType animatedPropertyTypeForCSSAttribute(const QualifiedName& attributeName);
 
     void sendSVGLoadEventToSelfAndAncestorChainIfPossible();
     bool sendSVGLoadEventIfPossible();
     void sendSVGLoadEventIfPossibleAsynchronously();
     void svgLoadEventTimerFired(Timer<SVGElement>*);
     virtual Timer<SVGElement>* svgLoadEventTimer();
 
-    virtual AffineTransform* animateMotionTransform() { return 0; }
+    virtual AffineTransform* animateMotionTransform() { return nullptr; }
 
     void invalidateSVGAttributes() { ensureUniqueElementData().m_animatedSVGAttributesAreDirty = true; }
     void invalidateSVGPresentationAttributeStyle() { ensureUniqueElementData().m_presentationAttributeStyleIsDirty = true; }
     void addSVGLengthPropertyToPresentationAttributeStyle(MutableStylePropertySet*, CSSPropertyID, SVGLength&);
 
     const WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement>>& instancesForElement() const;
     void mapInstanceToElement(SVGElement*);
     void removeInstanceMapping(SVGElement*);
 
     bool getBoundingBox(FloatRect&);
@@ skipping 164 matching lines @@
     template<typename T> inline bool is##thisType(const PassRefPtrWillBeRawPtr<T>& node) { return is##thisType(node.get()); } \
     template<typename T> inline bool is##thisType(const RefPtrWillBeMember<T>& node) { return is##thisType(node.get()); } \
     template <> inline bool isElementOfType<const thisType>(const SVGElement& element) { return is##thisType(element); } \
     DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace blink
 
 #include "core/SVGElementTypeHelpers.h"
 
 #endif // SVGElement_h