[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