Use plain int for borders widths when possible

Source/core/style/BorderData.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 48 matching lines @@
             return true;
         if (!m_topRight.width().isZero())
             return true;
         if (!m_bottomLeft.width().isZero())
             return true;
         if (!m_bottomRight.width().isZero())
             return true;
         return false;
     }
 
-    unsigned borderLeftWidth() const
+    int borderLeftWidth() const
     {
         if (!m_image.hasImage() && (m_left.style() == BNONE || m_left.style() == BHIDDEN))
             return 0;
         return m_left.width();
     }
 
-    unsigned borderRightWidth() const
+    int borderRightWidth() const
     {
         if (!m_image.hasImage() && (m_right.style() == BNONE || m_right.style() == BHIDDEN))
             return 0;
         return m_right.width();
     }
 
-    unsigned borderTopWidth() const
+    int borderTopWidth() const
     {
         if (!m_image.hasImage() && (m_top.style() == BNONE || m_top.style() == BHIDDEN))
             return 0;
         return m_top.width();
     }
 
-    unsigned borderBottomWidth() const
+    int borderBottomWidth() const
     {
         if (!m_image.hasImage() && (m_bottom.style() == BNONE || m_bottom.style() == BHIDDEN))
             return 0;
         return m_bottom.width();
     }
 
     bool operator==(const BorderData& o) const
     {
         return m_left == o.m_left && m_right == o.m_right && m_top == o.m_top && m_bottom == o.m_bottom && m_image == o.m_image
                && m_topLeft == o.m_topLeft && m_topRight == o.m_topRight && m_bottomLeft == o.m_bottomLeft && m_bottomRight == o.m_bottomRight;
@@ skipping 39 matching lines @@
 
     LengthSize m_topLeft;
     LengthSize m_topRight;
     LengthSize m_bottomLeft;
     LengthSize m_bottomRight;
 };
 
 } // namespace blink
 
 #endif // BorderData_h