This is a testharness.js-based test.
[FAIL] WebLocks of an iframe under a 3rd-party site are partitioned
  assert_equals: The 1p iframe failed to acquire the lock expected (undefined) undefined but got (boolean) true
[FAIL] WebLocks of a nested iframe with a cross-site ancestor are partitioned
  assert_equals: The 1p iframe failed to acquire the lock expected (undefined) undefined but got (boolean) true
Harness: the test ran to completion.