layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x584
      RenderBlock {DIV} at (0,0) size 784x314
        RenderText {#text} at (159,140) size 161x19
          text run at (159,140) width 161: "This should be centered. "
        RenderPartObject {IFRAME} at (320,0) size 304x154 [border: (2px inset #000000)]
          layer at (0,0) size 300x150
            RenderView at (0,0) size 300x150
          layer at (0,0) size 300x150
            RenderBlock {HTML} at (0,0) size 300x150
              RenderBody {BODY} at (8,8) size 284x134 [bgcolor=#FF0000]
        RenderBR {BR} at (624,154) size 0x0
        RenderText {#text} at (161,295) size 161x19
          text run at (161,295) width 161: "This should be centered. "
        RenderPartObject {OBJECT} at (322,159) size 300x150
          layer at (0,0) size 300x150
            RenderView at (0,0) size 300x150
          layer at (0,0) size 300x150
            RenderBlock {HTML} at (0,0) size 300x150
              RenderBody {BODY} at (8,8) size 284x134 [bgcolor=#FF0000]
        RenderBR {BR} at (622,309) size 0x0
