Taking this then...

 Issue 903877  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1bdcf632f3345eae5f589a5280fb85b4d4f210b1

commit 1bdcf632f3345eae5f589a5280fb85b4d4f210b1
Author: Sergio Villar Senin <svillar@igalia.com>
Date: Tue Nov 13 10:59:51 2018

Migrate RendererUpdater to IdentityManager

It's currently observer SigninManager but it could instead observe
IdentityManager. This will allow RenderUpdater to eventually use the
identity service.

Bug:  887453 
Change-Id: I588bcdaa1e0c5fe02207ad4fabff552193c49766
Reviewed-on: https://chromium-review.googlesource.com/c/1268339
Commit-Queue: Sergio Villar <svillar@igalia.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607556}
[modify] https://crrev.com/1bdcf632f3345eae5f589a5280fb85b4d4f210b1/chrome/browser/profiles/renderer_updater.cc
[modify] https://crrev.com/1bdcf632f3345eae5f589a5280fb85b4d4f210b1/chrome/browser/profiles/renderer_updater.h

Closing