Support subpixel layout for borders.

third_party/WebKit/Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 346 matching lines @@
   LayoutRect frameRect() const { return m_frameRect; }
   void setFrameRect(const LayoutRect& rect) {
     setLocation(rect.location());
     setSize(rect.size());
   }
 
   // Note that those functions have their origin at this box's CSS border box.
   // As such their location doesn't account for 'top'/'left'.
   LayoutRect borderBoxRect() const { return LayoutRect(LayoutPoint(), size()); }
   LayoutRect paddingBoxRect() const {
-    return LayoutRect(LayoutUnit(borderLeft()), LayoutUnit(borderTop()),
-                      clientWidth(), clientHeight());
+    return LayoutRect(borderLeft(), borderTop(), clientWidth(), clientHeight());
   }
   IntRect pixelSnappedBorderBoxRect() const {
     return IntRect(IntPoint(), m_frameRect.pixelSnappedSize());
   }
   IntRect borderBoundingBox() const final {
     return pixelSnappedBorderBoxRect();
   }
 
   // The content area of the box (excludes padding - and intrinsic padding for
   // table cells, etc... - and border).
@@ skipping 140 matching lines @@
 
   // More IE extensions.  clientWidth and clientHeight represent the interior of
   // an object excluding border and scrollbar. clientLeft/Top are just the
   // borderLeftWidth and borderTopWidth.
   DISABLE_CFI_PERF LayoutUnit clientLeft() const {
     return LayoutUnit(borderLeft() +
                       (shouldPlaceBlockDirectionScrollbarOnLogicalLeft()
                            ? verticalScrollbarWidth()
                            : 0));
   }
-  DISABLE_CFI_PERF LayoutUnit clientTop() const {
-    return LayoutUnit(borderTop());
-  }
+  DISABLE_CFI_PERF LayoutUnit clientTop() const { return borderTop(); }
   LayoutUnit clientWidth() const;
   LayoutUnit clientHeight() const;
   DISABLE_CFI_PERF LayoutUnit clientLogicalWidth() const {
     return style()->isHorizontalWritingMode() ? clientWidth() : clientHeight();
   }
   DISABLE_CFI_PERF LayoutUnit clientLogicalHeight() const {
     return style()->isHorizontalWritingMode() ? clientHeight() : clientWidth();
   }
   DISABLE_CFI_PERF LayoutUnit clientLogicalBottom() const {
     return borderBefore() + clientLogicalHeight();
@@ skipping 1090 matching lines @@
 
 inline bool LayoutBox::isForcedFragmentainerBreakValue(EBreak breakValue) {
   return breakValue == BreakColumn || breakValue == BreakLeft ||
          breakValue == BreakPage || breakValue == BreakRecto ||
          breakValue == BreakRight || breakValue == BreakVerso;
 }
 
 }  // namespace blink
 
 #endif  // LayoutBox_h