Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x116 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x100 children: not-inline
      Box <div.grid> at (8,8) content-size 100x100 [GFC] children: not-inline
        BlockContainer <div.test> at (8,8) content-size 100x100 [BFC] children: not-inline
          BlockContainer <div.big-child> at (8,8) content-size 500x100 children: not-inline

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x116]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x100]
      PaintableBox (Box<DIV>.grid) [8,8 100x100] overflow: [8,8 500x100]
        PaintableWithLines (BlockContainer<DIV>.test) [8,8 100x100] overflow: [8,8 500x100]
          PaintableWithLines (BlockContainer<DIV>.big-child) [8,8 500x100]
