Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x60 [BFC] children: not-inline
    BlockContainer <body> at (5,5) content-size 150x50 children: inline
      frag 0 from BlockContainer start: 0, length: 0, rect: [5,5 100x50] baseline: 50
      frag 1 from BlockContainer start: 0, length: 0, rect: [55,5 100x50] baseline: 50
      BlockContainer <div.foo> at (5,5) content-size 100x50 inline-block [BFC] children: not-inline
      BlockContainer <div.bar> at (55,5) content-size 100x50 inline-block [BFC] children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x60]
    PaintableWithLines (BlockContainer<BODY>) [0,0 160x60]
      PaintableWithLines (BlockContainer<DIV>.foo) [5,5 100x50]
      PaintableWithLines (BlockContainer<DIV>.bar) [55,5 100x50]
