Use Length for the stroke-width property in SVGLayoutStyle

Source/core/layout/style/SVGLayoutStyleDefs.h

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005 Rob Buis <buis@kde.org>
     Copyright (C) Research In Motion Limited 2010. All rights reserved.
 
     Based on khtml code by:
     Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
               (C) 2000 Antti Koivisto (koivisto@kde.org)
               (C) 2000-2003 Dirk Mueller (mueller@kde.org)
               (C) 2002-2003 Apple Computer, Inc.
@@ skipping 10 matching lines @@
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef SVGLayoutStyleDefs_h
 #define SVGLayoutStyleDefs_h
 
-#include "core/svg/SVGLength.h"
 #include "platform/Length.h"
 #include "platform/graphics/Color.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 #include "wtf/RefVector.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
@@ skipping 94 matching lines @@
     String paintUri;
     SVGPaintType visitedLinkPaintType;
     Color visitedLinkPaintColor;
     String visitedLinkPaintUri;
 
 private:
     StyleFillData();
     StyleFillData(const StyleFillData&);
 };
 
+class UnzoomedLength {
+public:
+    explicit UnzoomedLength(const Length& length) : m_length(length) { }
+
+    bool isZero() const { return m_length.isZero(); }
+
+    bool operator==(const UnzoomedLength& other) const { return m_length == other.m_length; }
+    bool operator!=(const UnzoomedLength& other) const { return !operator==(other); }
+
+    const Length& length() const { return m_length; }
+
+private:
+    Length m_length;
+};
+
 class StyleStrokeData : public RefCounted<StyleStrokeData> {
 public:
     static PassRefPtr<StyleStrokeData> create()
     {
         return adoptRef(new StyleStrokeData);
     }
 
     PassRefPtr<StyleStrokeData> copy() const
     {
         return adoptRef(new StyleStrokeData(*this));
     }
 
     bool operator==(const StyleStrokeData&) const;
     bool operator!=(const StyleStrokeData& other) const
     {
         return !(*this == other);
     }
 
     float opacity;
     float miterLimit;
 
-    RefPtrWillBePersistent<SVGLength> width;
+    UnzoomedLength width;
     Length dashOffset;
     RefPtr<SVGDashArray> dashArray;
 
     SVGPaintType paintType;
     Color paintColor;
     String paintUri;
     SVGPaintType visitedLinkPaintType;
     Color visitedLinkPaintColor;
     String visitedLinkPaintUri;
 
@@ skipping 101 matching lines @@
         Length rx;
         Length ry;
     private:
         StyleLayoutData();
         StyleLayoutData(const StyleLayoutData&);
     };
 
 } // namespace blink
 
 #endif // SVGLayoutStyleDefs_h