layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x152
  RenderBlock {HTML} at (0,0) size 800x152
    RenderBody {BODY} at (0,0) size 800x152 [bgcolor=#CCFFCC]
      RenderBlock {DIV} at (0,0) size 800x152
        RenderPartObject {IFRAME} at (0,0) size 152x152 [border: (1px solid #000000)]
          layer at (0,0) size 150x150
            RenderView at (0,0) size 150x150
          layer at (0,0) size 150x54
            RenderBlock {HTML} at (0,0) size 150x54
              RenderBody {BODY} at (8,8) size 134x38
                RenderBlock {DIV} at (0,0) size 134x38
                  RenderBlock {DIV} at (0,0) size 134x19
                    RenderText {#text} at (0,0) size 35x19
                      text run at (0,0) width 35: "test 1"
                  RenderBlock {DIV} at (0,19) size 134x19
                    RenderText {#text} at (0,0) size 35x19
                      text run at (0,0) width 35: "test 2"
