layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x492
  RenderBlock {HTML} at (0,0) size 800x492
    RenderBody {BODY} at (8,14) size 784x470
      RenderBlock {P} at (0,0) size 784x19
        RenderText {#text} at (0,0) size 462x19
          text run at (0,0) width 462: "The square below should be exactly 50% wide on the ruler at the bottom."
      RenderBlock {DIV} at (0,33) size 784x397
        RenderImage {IMG} at (0,0) size 392x392
