CL here: https://chromium-review.googlesource.com/c/chromium/src/+/1331473

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1d8fb7322d2ee3652ed38c2a380c252549b9d698

commit 1d8fb7322d2ee3652ed38c2a380c252549b9d698
Author: Mario Sanchez Prada <mario@igalia.com>
Date: Tue Nov 13 17:23:26 2018

Convert chrome/browser/ui/autofill/chrome_autofill_client.cc to Identity service

Migrated away from SigninManagerBase::GetAuthenticatedAccountId() and
AccountTrackerService::GetAccountInfo(), to rely on the IdentityManager.

Bug:  903886 
Change-Id: I4bd70c490760a9d22687545f7d22851f9cdb9a5a
Reviewed-on: https://chromium-review.googlesource.com/c/1331473
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#607632}
[modify] https://crrev.com/1d8fb7322d2ee3652ed38c2a380c252549b9d698/chrome/browser/ui/autofill/chrome_autofill_client.cc

Is there any behavior change associated with this migration?

> Is there any behavior change associated with this migration?

There shouldn't be any, since IdentityManager is a new API that relies underneath on the SigninManager and AccountTrackerService APIs (and other related APIS, such as OAuth2TokenService).

@sebsg: Confirming Mario's response; no, there won't be any behavioral change.

Thanks both for confirming!