[SVG] SVGLength{,List} migration to new SVG property impl.

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 220 matching lines @@
 
     // CSS properties animation code-path.
     ASSERT(m_animatedProperties.isEmpty());
     String baseValue;
 
     if (shouldApply == ApplyCSSAnimation) {
         ASSERT(SVGAnimationElement::isTargetAttributeCSSProperty(targetElement, attributeName));
         computeCSSPropertyValue(targetElement, cssPropertyID(attributeName.localName()), baseValue);
     }
 
-    if (!m_animatedType)
+    if (!m_animatedType || !m_animatedType->setValueAsString(attributeName, baseValue))
         m_animatedType = animator->constructFromString(baseValue);
-    else
-        m_animatedType->setValueAsString(attributeName, baseValue);
 }
 
 static inline void applyCSSPropertyToTarget(SVGElement* targetElement, CSSPropertyID id, const String& value)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!targetElement->m_deletionHasBegun);
 
     MutableStylePropertySet* propertySet = targetElement->ensureAnimatedSMILStyleProperties();
     if (!propertySet->setProperty(id, value, false, 0))
         return;
 
@@ skipping 180 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();
 }
 
 }