The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3110395e033d82da7dc51d08d16517fe72868a88

commit 3110395e033d82da7dc51d08d16517fe72868a88
Author: gangwu <gangwu@chromium.org>
Date: Fri Sep 16 16:00:08 2016

[USS] Covert kSyncEnableUSSDeviceInfo commandline flag to Feature API

BUG= 647492 

Review-Url: https://codereview.chromium.org/2341923004
Cr-Commit-Position: refs/heads/master@{#419176}

[modify] https://crrev.com/3110395e033d82da7dc51d08d16517fe72868a88/components/browser_sync/browser/profile_sync_components_factory_impl.cc
[modify] https://crrev.com/3110395e033d82da7dc51d08d16517fe72868a88/components/browser_sync/browser/profile_sync_service.cc
[modify] https://crrev.com/3110395e033d82da7dc51d08d16517fe72868a88/components/sync/driver/sync_driver_switches.cc
[modify] https://crrev.com/3110395e033d82da7dc51d08d16517fe72868a88/components/sync/driver/sync_driver_switches.h