GitLab

Update text and change so exit mirror mode will not trigger it. Partial
revert of crrev.com/c/2340265 as we may keep around some of the
notifications that are currently behind the flag.

Test: manual
Bug: 1111479
Change-Id: I285e5b41af06aeb940be02f6b9d2255531c9444b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2350901Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797424}