GitLab

This change converts callbacks from base::Bind and base::Callback to
Once/Repeating in //chrome/browser/chromeos/tether.

Bug: 1148570
Change-Id: Ic3b780c5714af71aae25691f77aad3fb69f5986d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2638571
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Auto-Submit: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844995}