CL here: https://chromium-review.googlesource.com/c/chromium/src/+/1412030

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aacb4fc1f524ade63567c41f4cf4515df22971c8

commit aacb4fc1f524ade63567c41f4cf4515df22971c8
Author: Mario Sanchez Prada <mario@igalia.com>
Date: Fri Jan 18 10:07:26 2019

Convert //chromeos/services/assistant/service.cc to use identity::ScopeSet

This allows removing a dependency on oauth2_token_service.h.

Bug:  921613 
Change-Id: I0470d54b30af8c481784dd37902a8485bf8c2b52
Reviewed-on: https://chromium-review.googlesource.com/c/1412030
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#624054}
[modify] https://crrev.com/aacb4fc1f524ade63567c41f4cf4515df22971c8/chromeos/services/assistant/service.cc