This is a testharness.js-based test.
[FAIL] Below-viewport srcdoc iframes load lazily
  assert_true: The window load event should have fired before the below-viewport srcdoc iframe's subresource loads expected true got false
[FAIL] Below-viewport data: url iframes load lazily
  assert_true: The window load event should have fired before the below-viewport data url iframe loads expected true got false
[FAIL] Below-viewport blob url iframes load lazily
  assert_true: The window load event should have fired before the below-viewport blob url iframe loads expected true got false
Harness: the test ran to completion.