This is a testharness.js-based test.
[FAIL] Verify frame gets early messages if setting synchronously message event listener
  promise_test: Unhandled rejection with value: "with_iframe timed out"
[FAIL] Verify frame does not get all messages if not setting event listener early
  promise_test: Unhandled rejection with value: "with_iframe timed out"
[FAIL] Verify frame does get messages in order
  promise_test: Unhandled rejection with value: "with_iframe timed out"
Harness: the test ran to completion.