GitLab

Update the Cert Provisioning UI when the state of a certificate
provisioning process changes.
Rate limit updates to the UI to max 1 update per 2 seconds to avoid
flickering / performance issues.

Bug: 1081396
Test: unit_tests
Change-Id: If539d19885e9e2804dfc9d3f662a58dff8f0be53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377729Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Reviewed-by: Michael Ershov <miersh@google.com>
Commit-Queue: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805449}