This test verifies the hit test regions given to the compositor specifically around composited overflow scroll elements.

scrollContent: layer(273x75) has hit test rect (0,13 273x12)

scrollContent5: layer(160x10) has hit test rect (0,0 160x10)
scrollContent5: layer(273x85) has hit test rect (0,13 273x12)

scrollContent6: layer(273x12) has hit test rect (0,0 273x12)

nestedContent: layer(140x10) has hit test rect (0,0 140x10)
nestedContent: layer(256x72) has hit test rect (0,30 256x12)

overflowwithhandler: layer(250x20) has hit test rect (0,0 250x10)
overflowwithhandler: layer(256x116) has hit test rect (0,0 256x116)
overflowwithhandler: layer(250x20) has hit test rect (0,10 70x10)
overflowwithhandler: layer(273x112) has hit test rect (0,10 273x52)

overflowwithborder: layer(250x20) has hit test rect (0,0 250x10)
overflowwithborder: layer(255x116) has hit test rect (0,0 255x116)
overflowwithborder: layer(250x20) has hit test rect (0,10 240x10)
overflowwithborder: layer(769x881) has hit test rect (5,349 290x70)

withTransform: layer(271x12) has hit test rect (0,0 271x12)
withTransform: layer(273x77) has hit test rect (0,13 273x14)