Update test to expect MediaKeySessionClosedReason
The EME spec for the closed promise [1] resolves with
MediaKeySessionClosedReason. So the result is not undefined, but for
this test is actually "closed-by-application".
wpt.fyi has this test failing for all browsers.
[1] https://w3c.github.io/encrypted-media/#dom-mediakeysession-closed
Bug: 343257599
Change-Id: Icf947fdbaef60274e9889515acded99dcf3f30b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5583574
Commit-Queue: Vikram Pasupathy vpasupathy@chromium.org
Reviewed-by: Vikram Pasupathy vpasupathy@chromium.org
Cr-Commit-Position: refs/heads/main@{#1308417}