[constructor.html]
  type: testharness
  [Animation can be constructed with null effect and null timeline]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1049975

  [Animation can be constructed with null effect and non-null timeline]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1049975

  [Animation can be constructed with non-null effect and null timeline]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1096776
