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
      RenderText {#text} at (0,1) size 783x74
        text run at (0,1) width 783: "This is a test to make sure rem units used on the root element"
        text run at (0,39) width 467: "are relative to the user agent default."
