[Sync] Add a fieldtrial testing config for new impl of wallet data sync

Bug: 853688
Change-Id: Idfd02f83693ad4861015d9edd3a9b23c7c6e174c
Reviewed-on: https://chromium-review.googlesource.com/1238175
Reviewed-by: Robert Kaplow (sloooow) <rkaplow@chromium.org>
Commit-Queue: Jan Krcal <jkrcal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593547}
1 file changed