In bug 243062, we added an optimisation to avoid the expensive computation of an updated MediaSessionInfo object when the previous state had no currentSrc URL and the current state doesn't either. But this excludes media elements that have a srcObject, whose state we still want to reflect through media sessions.
<rdar://problem/100477469>
Pull request: https://github.com/WebKit/WebKit/pull/4773
Committed 254948@main (6cfe0a4e9efc): <https://commits.webkit.org/254948@main> Reviewed commits have been landed. Closing PR #4773 and removing active labels.