This would allow us to replace GenericEventQueue in HTMLMediaElement and thereby get the correct ordering between events and other tasks. That's issue 587871.

It would be nice to use one of these for every task source in blink, which should help frame Blamer and potentially future user-agent interventions.

alexclarke@ and skyostill@, is this something your team might tackle? :)

Looks like this is on our Q2 list. Alex, it sounded like you were interested in owning this?

skyostill@, any news on this? :)

Not quite there yet, but some news:

1. There's now a TaskRunnerHelper which lets you get a MediaElementEvent task queue[1]. However for now that task queue falls back to a shared queue behind the covers. I'm imagining we'll add an API to create a task queue for a given task type next to this.

2. The scheduler is getting support for cancellable tasks any moment now, which is one of the requirements for a sub task queue.

3. The scheduler code has been moved into Blink, so making scheduler primitives oilpan'd is now tenable.

[1] https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/dom/TaskRunnerHelper.h?l=28&gs=cpp%253Ablink%253A%253Aenum-TaskType%253A%253AMediaElementEvent%2540chromium%252F..%252F..%252Fthird_party%252FWebKit%252FSource%252Fcore%252Fdom%252FTaskRunnerHelper.h%257Cdef&gsn=MediaElementEvent&ct=xref_usages

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I think we still want to consider this.

I don't think that we need this anymore — the part of comments #3 are addressed with capturing TaskTypes in the scheduler.