Relaunch Notification: Clean up

Move recommended timer to the desktop build because its usage in
Chrome OS was deleted. Update comments.

Bug: 963883
Change-Id: I05ece8ac88d5209b812f6a27bd72e69b96052705
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1674545
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Reviewed-by: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672033}
2 files changed