This is a testharness.js-based test.
[FAIL] Tests that VideoTrackGenerator forwards frames to sink
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] Tests that creating a VideoTrackGenerator works as expected
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] Tests that VideoFrames are destroyed on write
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] Generator writer rejects on mismatched media input
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] Generator writer rejects on non media input
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] A writer rejects when generator's track is stopped
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] A muted writer rejects when generator's track is stopped
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] A writer rejects when generator's track and clones are stopped
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
[FAIL] Tests that VideoTrackGenerator forwards frames only when unmuted
  promise_test: Unhandled rejection with value: object "ReferenceError: VideoTrackGenerator is not defined"
Harness: the test ran to completion.