This is a testharness.js-based test.
[FAIL] document.featurePolicy should not be present (use document.permissionsPolicy instead)
  assert_false: document.featurePolicy should not exist expected false got true
[FAIL] HTMLIFrameElement.prototype.featurePolicy should not be present
  assert_false: HTMLIFrameElement.prototype.featurePolicy should not exist expected false got true
Harness: the test ran to completion.