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Supervised users (including child accounts) use the sync subsystem to
load settings and URL allowlists from Google backends. Change these
data types to use sync transport mode because we want them to run
even if browser sync-the-feature is disabled.

Bug: 1043755
Test: Added to unit_tests and components_unittests
Test: Sign in child account and manually verify the types are running in chrome://sync-internals

Change-Id: Ic681adab2fd3101ec326b99ed3aee085f0597a10
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2142132
Commit-Queue: James Cook <jamescook@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Aga Wronska <agawronska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758814}