GitLab

Check each of crostini and plugin VM before adding buttons on the
notification, and update messages.

Bug: b/150341671
Change-Id: Id9973c27c9355b85bfe5d168ca8828500a7d5156
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2389303
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804484}