layer at (0,0) size 320x240
  RenderView at (0,0) size 320x240
layer at (0,0) size 320x148 layerType: background only
layer at (0,0) size 100x100
  RenderBlock (positioned) zI: -1 {DIV} at (0,0) size 100x100 [bgcolor=#FF0000]
layer at (0,0) size 320x148 layerType: foreground only
  RenderBlock {HTML} at (0,0) size 320x148
    RenderBody {BODY} at (8,120) size 304x20
      RenderBlock {DIV} at (0,0) size 304x0
      RenderBlock {DIV} at (0,0) size 304x20
        RenderText {#text} at (0,0) size 218x19
          text run at (0,0) width 218: "PASS: computed zIndex was auto"
layer at (0,0) size 100x100
  RenderBlock (positioned) {DIV} at (0,0) size 100x100 [bgcolor=#FFA500]
layer at (0,0) size 100x100
  RenderBlock (positioned) {DIV} at (0,0) size 100x100 [bgcolor=#008000]
