This is a testharness.js-based test.
[FAIL] Tests that the reader of a video MediaStreamTrackProcessor produces VideoFrame objects and is closed on track stop while running on a worker
  promise_test: Unhandled rejection with value: object "DataCloneError: Failed to execute 'postMessage' on 'Worker': MediaStreamTrack could not be serialized."
Harness: the test ran to completion.