EventStreamProviders events are tied to dart:html-specific logic

[srujzs]

We expose a number of EventStreamProviders to make it easier for people to subscribe to various events via Streams: https://github.com/dart-lang/web/blob/main/lib/src/helpers/events/events.dart. However, they're tied to the specifics of the dart:html implementation e.g. using webkit prefixes even though that prefix hasn't been used for many years: https://developer.mozilla.org/en-US/docs/Web/API/Document/fullscreenchange_event. Should we instead have them be reflective of the current web instead of what dart:html exposes? This may make it a tiny bit harder to migrate in some cases, but is likely worth it.

[kevmoo]

We 100% should map to where things are, not where they were!