layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x260
  RenderBlock {HTML} at (0,0) size 800x260
    RenderBody {BODY} at (8,8) size 784x212
      RenderBlock (anonymous) at (0,0) size 784x18
        RenderInline {DIV} at (0,0) size 528x16 [color=#FFFFFF] [bgcolor=#FF0000]
          RenderText {TEXT} at (0,1) size 528x16
            text run at (0,1) width 528: "Ahem_font_required_for_this_test."
        RenderText {TEXT} at (0,0) size 0x0
      RenderBlock {P} at (0,34) size 784x18
        RenderText {TEXT} at (0,0) size 284x18
          text run at (0,0) width 284: "There should be a big square green H below:"
      RenderBlock {DIV} at (40,92) size 120x120 [bgcolor=#008000]
        RenderBlock {DIV} at (40,0) size 40x40 [color=#FFFFFF]
          RenderText {TEXT} at (0,0) size 40x40
            text run at (0,0) width 40: "X"
        RenderBlock {DIV} at (40,80) size 40x40 [color=#FFFFFF]
          RenderText {TEXT} at (0,0) size 40x40
            text run at (0,0) width 40: "X"