[basic.tentative.https.window.html]
  [fetchLater() cannot be called without request.]
    expected: FAIL

  [fetchLater() throws TypeError on non-HTTPS URL.]
    expected: FAIL

  [fetchLater() throws RangeError on negative activateAfter.]
    expected: FAIL

  [fetchLater()'s return tells the deferred request is not yet sent.]
    expected: FAIL

  [fetchLater() throws TypeError when mutating its returned state.]
    expected: FAIL

  [fetchLater() throws AbortError when its initial abort signal is aborted.]
    expected: FAIL

  [fetchLater() does not throw error when it is aborted before sending.]
    expected: FAIL