Migrate sync_ui_util to SyncUserSettings

SyncUserSettings is a new class that encapsulates all the
user-configurable knobs for Sync. It replaces a bunch of setters
and getters directly on the SyncService.

Bug: 884159
Change-Id: Iae8ac063b497ba4a74244d73927bc093cb42b57e
Reviewed-on: https://chromium-review.googlesource.com/c/1333387
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607619}
1 file changed