LayoutTests/fast/scrolling/mac/event-region-subscroller-overflow-expected.txt

 Before adding scroller:

(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 800.00 600.00)
  (children 1
    (GraphicsLayer
      (bounds 800.00 600.00)
      (contentsOpaque 1)
      (children 1
        (GraphicsLayer
          (position 8.00 8.00)
          (bounds 200.00 200.00)
          (drawsContent 1)
        )
      )
    )
  )
)
After adding scroller:

(GraphicsLayer
  (anchor 0.00 0.00)
  (bounds 785.00 603.00)
  (children 1
    (GraphicsLayer
      (bounds 785.00 603.00)
      (contentsOpaque 1)
      (children 2
        (GraphicsLayer
          (position 8.00 212.00)
          (bounds 50.00 50.00)
          (event region
            (rect (0,0) width=50 height=50)
          )
          (children 2
            (GraphicsLayer
              (bounds 35.00 35.00)
              (event region
                (rect (0,0) width=35 height=35)
              )
              (children 1
                (GraphicsLayer
                  (anchor 0.00 0.00)
                  (bounds 35.00 100.00)
                  (drawsContent 1)
                  (event region
                    (rect (0,0) width=35 height=100)
                  )
                )
              )
            )
            (GraphicsLayer
              (bounds 50.00 50.00)
              (children 3
                (GraphicsLayer
                  (position 0.00 35.00)
                  (bounds 35.00 15.00)
                  (drawsContent 1)
                  (event region
                    (rect (0,0) width=35 height=15)
                  )
                )
                (GraphicsLayer
                  (position 35.00 0.00)
                  (bounds 15.00 35.00)
                  (drawsContent 1)
                  (event region
                    (rect (0,0) width=15 height=35)
                  )
                )
                (GraphicsLayer
                  (position 35.00 35.00)
                  (bounds 15.00 15.00)
                  (drawsContent 1)
                  (event region
                    (rect (0,0) width=15 height=15)
                  )
                )
              )
            )
          )
        )
        (GraphicsLayer
          (position 8.00 8.00)
          (bounds 200.00 200.00)
          (drawsContent 1)
          (event region
            (rect (0,0) width=200 height=200)
          )
        )
      )
    )
  )
)