Enable unsafe buffer warnings in //components/sync.

This CL opts //components/sync into unsafe buffer warnings and either
fixes unsafe buffer usage immediately or (in one case) leaves a TODO
to do this as a follow-up.

Bug: 352266313
Change-Id: Id6497c266571d216adaad7c13d2bfe48164c5279
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5692080
Reviewed-by: danakj <danakj@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Commit-Queue: Jan Keitel <jkeitel@google.com>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1326623}
NOKEYCHECK=True
GitOrigin-RevId: bda8b9cd4c1af80561a1df0874c3790fb149beac
1 file changed