Use Length for the stroke-dashoffset property in SVGLayoutStyle

Source/core/layout/style/LayoutStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 1349 matching lines @@
     void setFillOpacity(float f) { accessSVGStyle().setFillOpacity(f); }
 
     const SVGPaintType& strokePaintType() const { return svgStyle().strokePaintType(); }
     Color strokePaintColor() const { return svgStyle().strokePaintColor(); }
     float strokeOpacity() const { return svgStyle().strokeOpacity(); }
     void setStrokeOpacity(float f) { accessSVGStyle().setStrokeOpacity(f); }
     SVGLength* strokeWidth() const { return svgStyle().strokeWidth(); }
     void setStrokeWidth(PassRefPtrWillBeRawPtr<SVGLength> w) { accessSVGStyle().setStrokeWidth(w); }
     SVGLengthList* strokeDashArray() const { return svgStyle().strokeDashArray(); }
     void setStrokeDashArray(PassRefPtrWillBeRawPtr<SVGLengthList> array) { accessSVGStyle().setStrokeDashArray(array); }
-    SVGLength* strokeDashOffset() const { return svgStyle().strokeDashOffset(); }
-    void setStrokeDashOffset(PassRefPtrWillBeRawPtr<SVGLength> d) { accessSVGStyle().setStrokeDashOffset(d); }
+    const Length& strokeDashOffset() const { return svgStyle().strokeDashOffset(); }
+    void setStrokeDashOffset(const Length& d) { accessSVGStyle().setStrokeDashOffset(d); }
     float strokeMiterLimit() const { return svgStyle().strokeMiterLimit(); }
     void setStrokeMiterLimit(float f) { accessSVGStyle().setStrokeMiterLimit(f); }
 
     void setX(Length x) { accessSVGStyle().setX(x); }
     void setY(Length y) { accessSVGStyle().setY(y); }
     void setRx(Length rx) { accessSVGStyle().setRx(rx); }
     void setRy(Length ry) { accessSVGStyle().setRy(ry); }
 
     float floodOpacity() const { return svgStyle().floodOpacity(); }
     void setFloodOpacity(float f) { accessSVGStyle().setFloodOpacity(f); }
@@ skipping 474 matching lines @@
 }
 
 inline bool LayoutStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags.pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 } // namespace blink
 
 #endif // LayoutStyle_h