[wpt] Fail VideoTrackGenerator-with-window-tracks.https.html faster
VideoTrackGenerator is not exposed to workers, which currently causes
the test to hang. Surface worker errors to the promise_test()s
instead.
Drive-by: always revoke the temporary script URL.
Bug: 40058895
Change-Id: Id0e3830abadecac7c76853235a09b201fdad1af0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5922435
Auto-Submit: Jonathan Lee jonathanjlee@google.com
Reviewed-by: Harald Alvestrand hta@chromium.org
Commit-Queue: Jonathan Lee jonathanjlee@google.com
Cr-Commit-Position: refs/heads/main@{#1368294}