GitLab

The field gets populated only if the committing client is sure about
the GUID being the authoritative one (consistent with the originator
client item ID).

Instead of introducing a new field for the originator item ID or a
boolean representing whether the GUID is indeed authoritative/final,
the existing field |client_tag_hash| is leveraged for this purpose,
which was unpopulated for bookmarks prior to this patch.

This is aligned with future plans to actually introduce a client tag
for bookmarks, just like for the rest of sync datatypes.

Bug: 978430
Change-Id: I66dd9d46d2d23aa86b0c9d88dcd6aed4a896c834
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1981610
Commit-Queue: Mikel Astiz <mastiz@chromium.org>
Reviewed-by: Mohamed Amir Yosef <mamir@chromium.org>
Cr-Commit-Position: refs/heads/master@{#732335}