layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x266
  RenderBlock {HTML} at (0,0) size 800x266
    RenderBody {BODY} at (8,16) size 784x242
      RenderBlock {P} at (0,0) size 784x20
        RenderText {#text} at (0,0) size 414x19
          text run at (0,0) width 414: "The square below should be exactly 100 pixels high on the ruler."
      RenderBlock {DIV} at (0,36) size 784x206
        RenderImage {IMG} at (45,0) size 100x100
