LayoutTests/compositing/contents-opaque/overflow-hidden-child-layers-expected.txt

(GraphicsLayer
  (bounds 800.00 600.00)
  (children 1
    (GraphicsLayer
      (bounds 800.00 600.00)
      (contentsOpaque 1)
      (children 1
        (GraphicsLayer
          (position 30.00 22.00)
          (bounds 156.00 156.00)
          (drawsContent 1)
        )
      )
    )
  )
)