[held.tentative.https.html]
  expected:
    if (os == "linux") and debug and fission: [OK, TIMEOUT]
  [A held lock on the main thread should not prevent bfcache]
    expected: PRECONDITION_FAILED

  [A held lock on a worker should not prevent bfcache]
    expected: PRECONDITION_FAILED

  [A held lock on a nested worker should not prevent bfcache]
    expected: PRECONDITION_FAILED

  [A held lock on a shared worker should not prevent bfcache]
    expected: PRECONDITION_FAILED