GitLab

- Responsible for managing the internal notifications set and sending
  inline replies for notifications.

Bug: 1106937
Test: chromeos_components_unittests
Change-Id: I659f3b16c06005d213beb9c2cbe21618f35404c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466980Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Jimmy Gong <jimmyxgong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816893}