GitLab

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

TBR=avi@chromium.org

Bug: 953861, 1007763
Change-Id: I58af3a799b7b376f1a7a902823cda3ca0c5ffb03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1939965Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719794}