Introduce BorderImageLength and BorderImageLengthBox

Source/core/rendering/RenderBoxModelObject.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 1130 matching lines @@
         geometry.setSpaceSize(IntSize(geometry.spaceSize().width(), 0));
     }
 
     if (fixedAttachment)
         geometry.useFixedAttachment(snappedPaintRect.location());
 
     geometry.clip(snappedPaintRect);
     geometry.setDestOrigin(geometry.destRect().location());
 }
 
-static LayoutUnit computeBorderImageSide(Length borderSlice, LayoutUnit borderSide, LayoutUnit imageSide, LayoutUnit boxExtent, RenderView* renderView)
+static LayoutUnit computeBorderImageSide(const BorderImageLength& borderSlice, LayoutUnit borderSide, LayoutUnit imageSide, LayoutUnit boxExtent, RenderView* renderView)
 {
-    if (borderSlice.isRelative())
-        return borderSlice.value() * borderSide;
-    if (borderSlice.isAuto())
+    if (borderSlice.isNumber())
+        return borderSlice.number() * borderSide;
+    if (borderSlice.length().isAuto())
         return imageSide;
-    return valueForLength(borderSlice, boxExtent, renderView);
+    return valueForLength(borderSlice.length(), boxExtent, renderView);
 }
 
 bool RenderBoxModelObject::paintNinePieceImage(GraphicsContext* graphicsContext, const LayoutRect& rect, const RenderStyle* style,
                                                const NinePieceImage& ninePieceImage, CompositeOperator op)
 {
     StyleImage* styleImage = ninePieceImage.image();
     if (!styleImage)
         return false;
 
     if (!styleImage->isLoaded())
@@ skipping 1670 matching lines @@
     ASSERT(!beforeChild || toBoxModelObject == beforeChild->parent());
     for (RenderObject* child = startChild; child && child != endChild; ) {
         // Save our next sibling as moveChildTo will clear it.
         RenderObject* nextSibling = child->nextSibling();
         moveChildTo(toBoxModelObject, child, beforeChild, fullRemoveInsert);
         child = nextSibling;
     }
 }
 
 } // namespace WebCore