SVGTransformList.consolidate() should return null on an empty list

third_party/WebKit/Source/core/svg/SVGTransformList.cpp

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2012. 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
@@ skipping 25 matching lines @@
 
 namespace blink {
 
 SVGTransformList::SVGTransformList() {}
 
 SVGTransformList::~SVGTransformList() {}
 
 SVGTransform* SVGTransformList::consolidate() {
   AffineTransform matrix;
   if (!concatenate(matrix))
-    return SVGTransform::create();
+    return nullptr;
 
   return initialize(SVGTransform::create(matrix));
 }
 
 bool SVGTransformList::concatenate(AffineTransform& result) const {
   if (isEmpty())
     return false;
 
   ConstIterator it = begin();
   ConstIterator itEnd = end();
@@ skipping 468 matching lines @@
 
   // Spec: http://www.w3.org/TR/SVG/animate.html#complexDistances
   // Paced animations assume a notion of distance between the various animation
   // values defined by the 'to', 'from', 'by' and 'values' attributes.  Distance
   // is defined only for scalar types (such as <length>), colors and the subset
   // of transformation types that are supported by 'animateTransform'.
   return SVGTransformDistance(at(0), toList->at(0)).distance();
 }
 
 }  // namespace blink