Use Length for the stroke-dashoffset property in SVGLayoutStyle

Source/core/css/LayoutStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 2502 matching lines @@
         return CSSPrimitiveValue::createIdentifier(CSSValueNone);
     case CSSPropertyMarkerStart:
         if (!svgStyle.markerStartResource().isEmpty())
             return CSSPrimitiveValue::create(serializeAsFragmentIdentifier(svgStyle.markerStartResource()), CSSPrimitiveValue::CSS_URI);
         return CSSPrimitiveValue::createIdentifier(CSSValueNone);
     case CSSPropertyStroke:
         return adjustSVGPaintForCurrentColor(svgStyle.strokePaintType(), svgStyle.strokePaintUri(), svgStyle.strokePaintColor(), style.color());
     case CSSPropertyStrokeDasharray:
         return strokeDashArrayToCSSValueList(svgStyle.strokeDashArray());
     case CSSPropertyStrokeDashoffset:
-        return SVGLength::toCSSPrimitiveValue(svgStyle.strokeDashOffset());
+        return zoomAdjustedPixelValueForLength(svgStyle.strokeDashOffset(), style);
     case CSSPropertyStrokeWidth:
         return SVGLength::toCSSPrimitiveValue(svgStyle.strokeWidth());
     case CSSPropertyBaselineShift: {
         switch (svgStyle.baselineShift()) {
         case BS_SUPER:
             return CSSPrimitiveValue::createIdentifier(CSSValueSuper);
         case BS_SUB:
             return CSSPrimitiveValue::createIdentifier(CSSValueSub);
         case BS_LENGTH:
             return zoomAdjustedPixelValueForLength(svgStyle.baselineShiftValue(), style);
@@ skipping 32 matching lines @@
         return zoomAdjustedPixelValueForLength(svgStyle.ry(), style);
 
     case CSSPropertyAll:
         return nullptr;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }