Use Length for the stroke-dashoffset property in SVGLayoutStyle

Source/core/layout/style/SVGLayoutStyle.cpp

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2010 Rob Buis <buis@kde.org>
     Copyright (C) Research In Motion Limited 2010. All rights reserved.
 
     Based on khtml code by:
     Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
     Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
     Copyright (C) 2002-2003 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Apple Computer, Inc.
@@ skipping 157 matching lines @@
         return true;
 
     // Some stroke properties, requires relayouts, as the cached stroke boundaries need to be recalculated.
     if (stroke.get() != other->stroke.get()) {
         if (*stroke->width != *other->stroke->width
             || stroke->paintType != other->stroke->paintType
             || stroke->paintColor != other->stroke->paintColor
             || stroke->paintUri != other->stroke->paintUri
             || stroke->miterLimit != other->stroke->miterLimit
             || *stroke->dashArray != *other->stroke->dashArray
-            || *stroke->dashOffset != *other->stroke->dashOffset
+            || stroke->dashOffset != other->stroke->dashOffset
             || stroke->visitedLinkPaintColor != other->stroke->visitedLinkPaintColor
             || stroke->visitedLinkPaintUri != other->stroke->visitedLinkPaintUri
             || stroke->visitedLinkPaintType != other->stroke->visitedLinkPaintType)
             return true;
     }
 
     // The x, y, rx and ry properties require a re-layout.
     if (layout.get() != other->layout.get()) {
         if (layout->x != other->layout->x
             || layout->y != other->layout->y
@@ skipping 51 matching lines @@
 }
 
 EPaintOrderType SVGLayoutStyle::paintOrderType(unsigned index) const
 {
     ASSERT(index < ((1 << kPaintOrderBitwidth)-1));
     unsigned pt = (paintOrder() >> (kPaintOrderBitwidth*index)) & ((1u << kPaintOrderBitwidth) - 1);
     return (EPaintOrderType)pt;
 }
 
 }