Switch line layout to LayoutUnit.

Source/core/layout/LayoutBoxModelObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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
@@ skipping 801 matching lines @@
             x += textIndentOffset;
         break;
     case AlignCenter:
         x = (x + maxX) / 2;
         if (currentStyle.isLeftToRightDirection())
             x += textIndentOffset / 2;
         else
             x -= textIndentOffset / 2;
         break;
     case AlignRight:
-        x = maxX - caretWidth;
+        x = maxX - caretWidth();
         if (!currentStyle.isLeftToRightDirection())
             x -= textIndentOffset;
         break;
     }
-    x = std::min(x, std::max<LayoutUnit>(maxX - caretWidth, 0));
+    x = std::min(x, std::max<LayoutUnit>(maxX - caretWidth(), 0));
 
     LayoutUnit height = style()->fontMetrics().height();
     LayoutUnit verticalSpace = lineHeight(true, currentStyle.isHorizontalWritingMode() ? HorizontalLine : VerticalLine,  PositionOfInteriorLineBoxes) - height;
     LayoutUnit y = paddingTop() + borderTop() + (verticalSpace / 2);
-    return currentStyle.isHorizontalWritingMode() ? LayoutRect(x, y, caretWidth, height) : LayoutRect(y, x, height, caretWidth);
+    return currentStyle.isHorizontalWritingMode() ? LayoutRect(x, y, caretWidth(), height) : LayoutRect(y, x, height, caretWidth());
 }
 
 void LayoutBoxModelObject::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
 {
     LayoutObject* o = container();
     if (!o)
         return;
 
     o->mapAbsoluteToLocalPoint(mode, transformState);
 
@@ skipping 95 matching lines @@
     ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent());
     for (LayoutObject* child = startChild; child && child != endChild; ) {
         // Save our next sibling as moveChildTo will clear it.
         LayoutObject* nextSibling = child->nextSibling();
         moveChildTo(toBoxModelObject, child, beforeChild, fullRemoveInsert);
         child = nextSibling;
     }
 }
 
 } // namespace blink