layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x226
  RenderBlock {HTML} at (0,0) size 800x134
    RenderBody {BODY} at (8,8) size 784x118
      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 {DIV} at (0,18) size 300x100 [bgcolor=#FF0000]
        RenderBlock {DIV} at (0,0) size 600x200 [color=#008000]
          RenderText {TEXT} at (0,0) size 300x100
            text run at (0,0) width 300: "XXX"