tree b8d5f243168c34d97b37fb6a8a752d6062512c2e
parent c0b0a0d72066faf8838420b601bcd99d94842b22
author Robert Ma <robertma@chromium.org> 1565209621 -0400
committer Robert Ma <bob1211@gmail.com> 1565299727 -0700

[cookie-store] Deflake service worker registration

Instead of attempting to unregister previously installed service workers
at the beginning of a test, use `add_completion_callback` to unregister
them at test completion. This will deflake the tests when they are run
multiple times without restarts (`--rerun`).

The alternative is to do what many tests in service-workers do:
unregister service workers at the start, but wait for newly installed
service workers to become activated and use `registration.active`
instead of `registration.installing`, which is a bit more complex.