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

Source/core/svg/SVGTextPathElement.h

 /*
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 93 matching lines @@
         TEXTPATH_METHODTYPE_UNKNOWN = SVGTextPathMethodUnknown,
         TEXTPATH_METHODTYPE_ALIGN = SVGTextPathMethodAlign,
         TEXTPATH_METHODTYPE_STRETCH = SVGTextPathMethodStretch,
         TEXTPATH_SPACINGTYPE_UNKNOWN = SVGTextPathSpacingUnknown,
         TEXTPATH_SPACINGTYPE_AUTO = SVGTextPathSpacingAuto,
         TEXTPATH_SPACINGTYPE_EXACT = SVGTextPathSpacingExact
     };
 
     static PassRefPtr<SVGTextPathElement> create(Document&);
 
+    SVGAnimatedLength* startOffset() const { return m_startOffset.get(); }
+
 private:
     explicit SVGTextPathElement(Document&);
 
     virtual ~SVGTextPathElement();
 
     void clearResourceReferences();
 
     virtual void buildPendingResource();
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&);
 
     virtual RenderObject* createRenderer(RenderStyle*);
     virtual bool childShouldCreateRenderer(const Node& child) const;
     virtual bool rendererIsNeeded(const RenderStyle&);
 
     virtual bool selfHasRelativeLengths() const;
 
+    RefPtr<SVGAnimatedLength> m_startOffset;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGTextPathElement)
-        DECLARE_ANIMATED_LENGTH(StartOffset, startOffset)
         DECLARE_ANIMATED_ENUMERATION(Method, method, SVGTextPathMethodType)
         DECLARE_ANIMATED_ENUMERATION(Spacing, spacing, SVGTextPathSpacingType)
         DECLARE_ANIMATED_STRING(Href, href)
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGTextPathElement, hasTagName(SVGNames::textPathTag));
 
 } // namespace WebCore
 
 #endif