[worklet-animation-local-time-null-1.https.html]
[A worklet which never sets localTime has no effect.]
expected: FAIL
[A worklet which sets localTime to null has no effect.]
expected: FAIL
[A worklet which changes localTime to from a number to null has no effect on transform.]
expected: FAIL
[A worklet which changes localTime to from a number to null has no effect on backgroundColor.]
expected: FAIL