CONSOLE MESSAGE: TypeError: target.attributeStyleMap.set is not a function. (In 'target.attributeStyleMap.set('width', width)', 'target.attributeStyleMap.set' is undefined)
layer at (0,0) size 800x600
  RenderView at (0,0) size 800x600
layer at (0,0) size 800x158
  RenderBlock {HTML} at (0,0) size 800x158
    RenderBody {BODY} at (8,16) size 784x134
      RenderBlock {P} at (0,0) size 784x18
        RenderText {#text} at (0,0) size 274x18
          text run at (0,0) width 274: "Test passes if there is a filled green square."
      RenderBlock {DIV} at (0,34) size 784x100 [bgcolor=#008000]