The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2cf0e2a53871661f63fb4e50b692119ad0a5eae4

commit 2cf0e2a53871661f63fb4e50b692119ad0a5eae4
Author: Henrique Ferreiro <hferreiro@igalia.com>
Date: Tue Jan 15 10:30:58 2019

Migrate signin_util.cc to IdentityManager

Replace SigninManager with IdentityManager and SiginManager::SignOut()
with PrimaryAccountMutator::ClearPrimaryAccount().

Bug:  920228 
Change-Id: Ia053f0aa6ee9bf86b88011e804e79c8577c88263
Reviewed-on: https://chromium-review.googlesource.com/c/1406989
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#622799}
[modify] https://crrev.com/2cf0e2a53871661f63fb4e50b692119ad0a5eae4/chrome/browser/signin/signin_util.cc