Support subpixel layout for borders.

third_party/WebKit/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 45 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;
   }
 
-  int borderLeftWidth() const {
+  float borderLeftWidth() const {
     if (m_left.style() == BorderStyleNone ||
         m_left.style() == BorderStyleHidden)
       return 0;
     return m_left.width();
   }
 
-  int borderRightWidth() const {
+  float borderRightWidth() const {
     if (m_right.style() == BorderStyleNone ||
         m_right.style() == BorderStyleHidden)
       return 0;
     return m_right.width();
   }
 
-  int borderTopWidth() const {
+  float borderTopWidth() const {
     if (m_top.style() == BorderStyleNone || m_top.style() == BorderStyleHidden)
       return 0;
     return m_top.width();
   }
 
-  int borderBottomWidth() const {
+  float borderBottomWidth() const {
     if (m_bottom.style() == BorderStyleNone ||
         m_bottom.style() == BorderStyleHidden)
       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 && radiiEqual(o);
   }
@@ skipping 44 matching lines @@
 
   LengthSize m_topLeft;
   LengthSize m_topRight;
   LengthSize m_bottomLeft;
   LengthSize m_bottomRight;
 };
 
 }  // namespace blink
 
 #endif  // BorderData_h