Split StyleSurroundData::offset into separate members.

third_party/WebKit/Source/core/style/StyleSurroundData.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 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 29 matching lines @@
   static PassRefPtr<StyleSurroundData> create() {
     return adoptRef(new StyleSurroundData);
   }
   PassRefPtr<StyleSurroundData> copy() const {
     return adoptRef(new StyleSurroundData(*this));
   }
 
   bool operator==(const StyleSurroundData&) const;
   bool operator!=(const StyleSurroundData& o) const { return !(*this == o); }
 
-  LengthBox offset;
+  Length m_left;
+  Length m_right;
+  Length m_top;
+  Length m_bottom;
   LengthBox margin;
   LengthBox padding;
   BorderData border;
 
  private:
   StyleSurroundData();
   StyleSurroundData(const StyleSurroundData&);
 };
 
 }  // namespace blink
 
 #endif  // StyleSurroundData_h