Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x48 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x0 children: inline
      BlockContainer <div.r> at (8,-2) content-size 50x50 floating [BFC] children: not-inline
      TextNode <#text>
      BlockContainer <div.g> at (58,-2) content-size 50x50 floating [BFC] children: not-inline
      TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x48]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x0]
      PaintableWithLines (BlockContainer<DIV>.r) [8,-2 50x50]
      PaintableWithLines (BlockContainer<DIV>.g) [58,-2 50x50]
