Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x34 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x18 children: not-inline
      Box <div.grid-container> at (8,8) content-size 784x18 [GFC] children: not-inline
        BlockContainer <div.first> at (8,8) content-size 307.484375x18 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 5, rect: [8,8 42.140625x18] baseline: 13.796875
              "First"
          TextNode <#text>
        BlockContainer <div.second> at (392.359375,8) content-size 79.921875x18 [BFC] children: inline
          frag 0 from TextNode start: 0, length: 6, rect: [392.359375,8 57.40625x18] baseline: 13.796875
              "Second"
          TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x34]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x18]
      PaintableBox (Box<DIV>.grid-container) [8,8 784x18]
        PaintableWithLines (BlockContainer<DIV>.first) [8,8 307.484375x18]
          TextPaintable (TextNode<#text>)
        PaintableWithLines (BlockContainer<DIV>.second) [392.359375,8 79.921875x18]
          TextPaintable (TextNode<#text>)
