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(256x116) has hit test rect (-1,-1 258x118)
overflowwithhandler: layer(250x20) has hit test rect (0,0 250x10)
overflowwithhandler: layer(250x20) has hit test rect (0,10 70x10)
overflowwithhandler: layer(273x112) has hit test rect (0,10 273x52)
overflowwithborder: layer(263x124) has hit test rect (-6,-6 275x136)
overflowwithborder: layer(250x20) has hit test rect (0,0 250x10)
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(282x77) has hit test rect (0,13 273x14)