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 (8,14) size 784x130
      RenderBlock {P} at (0,0) size 784x19
        RenderText {#text} at (0,0) size 402x19
          text run at (0,0) width 402: "The square below should be exactly 50 pixels wide on the ruler."
      RenderBlock {DIV} at (0,33) size 784x97
        RenderImage {IMG} at (0,0) size 50x50
