Bug 287929 – [WebDriver][BiDi] Support event subscription id's

• Status: RESOLVED
• Resolution: FIXED
• Component: WebDriver

[Lauro Moura]

https://w3c.github.io/webdriver-bidi/#events

> A BiDi session has subscriptions which is a list of subscriptions.

> A BiDi session has a known subscription ids which is a set of all subscription ids that have been issued to the local end but which have not yet been unsubscribed.

> A subscription is a struct consisting of a subscription id (a string), event names (a set of event names), top-level traversable ids (a set of IDs of top-level traversables) and user context ids (a set of IDs of user contexts).

The subscription id is the value returned by `session.subscribe` [1] and optionally given as parameter to `session.unsubscribe` [2].

Related spec PR: https://github.com/w3c/webdriver-bidi/pull/828

[1] https://w3c.github.io/webdriver-bidi/#command-session-subscribe
[2] https://w3c.github.io/webdriver-bidi/#command-session-unsubscribe

[Radar WebKit Bug Importer]

<rdar://problem/145624944>

[Lauro Moura]

Pull request: https://github.com/WebKit/WebKit/pull/45230

[EWS]

Committed 295276@main (4bc81ef1ff54): <https://commits.webkit.org/295276@main>

Reviewed commits have been landed. Closing PR #45230 and removing active labels.