Use Length for baselineShiftValue in SVGLayoutStyle

Source/core/layout/style/SVGLayoutStyleDefs.cpp

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2007 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 126 matching lines @@
     , lightingColor(SVGLayoutStyle::initialLightingColor())
     , baselineShiftValue(SVGLayoutStyle::initialBaselineShiftValue())
 {
 }
 
 StyleMiscData::StyleMiscData(const StyleMiscData& other)
     : RefCounted<StyleMiscData>()
     , floodColor(other.floodColor)
     , floodOpacity(other.floodOpacity)
     , lightingColor(other.lightingColor)
-    , baselineShiftValue(other.baselineShiftValue->clone())
+    , baselineShiftValue(other.baselineShiftValue)
 {
 }
 
 bool StyleMiscData::operator==(const StyleMiscData& other) const
 {
     return floodOpacity == other.floodOpacity
         && floodColor == other.floodColor
         && lightingColor == other.lightingColor
-        && *baselineShiftValue == *other.baselineShiftValue;
+        && baselineShiftValue == other.baselineShiftValue;
 }
 
 StyleResourceData::StyleResourceData()
     : clipper(SVGLayoutStyle::initialClipperResource())
     , filter(SVGLayoutStyle::initialFilterResource())
     , masker(SVGLayoutStyle::initialMaskerResource())
 {
 }
 
 StyleResourceData::StyleResourceData(const StyleResourceData& other)
@@ skipping 51 matching lines @@
     return adoptRef(new StyleLayoutData(*this));
 }
 
 bool StyleLayoutData::operator==(const StyleLayoutData& other) const
 {
     return x == other.x
         && y == other.y;
 }
 
 }