[SVG] Handle non-SVGAnimateElement results in calculateAnimatedValue()

Source/core/svg/SVGAnimateElement.cpp

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. 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 81 matching lines @@
     } else if (propertyTypes.size() == 2)
         ASSERT(propertyTypes[0] == propertyTypes[1]);
 
     return type;
 }
 
 void SVGAnimateElement::calculateAnimatedValue(float percentage, unsigned repeatCount, SVGSMILElement* resultElement)
 {
     ASSERT(resultElement);
     SVGElement* targetElement = this->targetElement();
-    if (!targetElement)
+    if (!targetElement || !isSVGAnimateElement(*resultElement))
         return;
 
     ASSERT(m_animatedPropertyType == determineAnimatedPropertyType(targetElement));
 
     ASSERT(percentage >= 0 && percentage <= 1);
     ASSERT(m_animatedPropertyType != AnimatedTransformList || hasTagName(SVGNames::animateTransformTag));
     ASSERT(m_animatedPropertyType != AnimatedUnknown);
     ASSERT(m_animator);
     ASSERT(m_animator->type() == m_animatedPropertyType);
     ASSERT(m_fromType);
@@ skipping 320 matching lines @@
 
 SVGAnimatedTypeAnimator* SVGAnimateElement::ensureAnimator()
 {
     if (!m_animator)
         m_animator = SVGAnimatorFactory::create(this, targetElement(), m_animatedPropertyType);
     ASSERT(m_animatedPropertyType == m_animator->type());
     return m_animator.get();
 }
 
 }