[sandboxed_FileSystemSyncAccessHandle-flush.https.tentative.worker.html]
  [Test flush on an empty file.]
    expected: FAIL

  [SyncAccessHandle.read returns bytes written by SyncAccessHandle.write after SyncAccessHandle.flush]
    expected: FAIL

  [SyncAccessHandle.read fails when there is a pending SyncAccessHandle.flush]
    expected: FAIL

  [SyncAccessHandle.write fails when there is a pending SyncAccessHandle.flush]
    expected: FAIL
