The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b7a017179b70d6098416d342889b5994cdd04331

commit b7a017179b70d6098416d342889b5994cdd04331
Author: Julie Jeongeun Kim <jkim@igalia.com>
Date: Mon Jan 21 01:42:34 2019

[s13n] Convert SyncConsentScreen away from SigninManager

This CL makes SyncConsentScreen use IdentityManager instead
of SigninManager.

SigninManager is going to be an implementation detail of
IdentityManager.

Bug:  920206 
Change-Id: I0d429829ce337ca11f5485ca0298ccc2b9676237
Reviewed-on: https://chromium-review.googlesource.com/c/1420485
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#624505}
[modify] https://crrev.com/b7a017179b70d6098416d342889b5994cdd04331/chrome/browser/chromeos/login/screens/sync_consent_screen.cc