GitLab

Use OnceCallback where possible, and BindRepeating where it is meant to
be called more than once.

R=avi@chromium.org
TBR=dpranke

Bug: 953861
Change-Id: I324303b817f72ac38fa253609785565aec0c241d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1932667Reviewed-by: Camille Lamy <clamy@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719181}