GitLab

Use an expiration scheduler to notify the certificate manager when a
public certificate has expired. Then, remove all expired public
certificates from storage.

Fixed: b/166117022
Change-Id: I28b019d805518e9f9520ccd427840f75bd5bee1a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2377070
Commit-Queue: Josh Nohle <nohle@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805294}