Re: [w3c/ServiceWorker] WIP: Handing fetch termination (#1178)

jakearchibald commented on this pull request.



> @@ -2996,6 +2997,9 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
               1. If |e|'s [=FetchEvent/respond-with error flag=] is set, set |handleFetchFailed| to true.
               1. Else, set |response| to |e|'s [=FetchEvent/potential response=].
           1. If |e|'s <a>canceled flag</a> is set, set |eventCanceled| to true.
+          1. Run the following steps [=in parallel=]:
+              1. Wait for the fetch to become [=fetch/terminated=].
+              1. [=Queue a task=] to [=AbortSignal/signal abort=] on |requestObject|'s [=Request/signal=].

I could wait until on of the following:

* Fetch is terminated.
* "Process response" for fetch occurs, and the response type is "error".
* "Process response done" for fetch occurs.

Then, only signal abort if fetch is terminated.

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