"Optionally, based on platform conventions, the ..." about mediasession

[richtr]

Thanks for the feedback.

in other words if there are active media elements in the current session we will not reach step5.

That is correct IIUC. Imagining we have two media elements bound to the same active media session; then removing one of those media elements from the media session will not tear down media controls for the remaining media element (since we would abort the algorithm at step 2). When that second element is subsequently removed from the media session then we will reach step 5. At that point we should tear down media session's media controls as there are no longer any active media elements within the media session.

It is probably safe to drop the mention of 'active participating media elements' in step 5 because, simply, it is impossible to have any 'active participating media elements' by the time you reach step 5 (because, as you point out, we return if we have one or more remaining active participating media elements at step 2).

I do think this algorithm could be written more clearly and I will try to work on that this week.

[richtr]

I've added a note to the spec explaining this in f40f146.