The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/05c32ab7198dc1aa6f87b5872b3e98195dede873

commit 05c32ab7198dc1aa6f87b5872b3e98195dede873
Author: Mario Sanchez Prada <mario@igalia.com>
Date: Tue Nov 06 18:01:21 2018

[ios] Migrate ClearBrowsingDataManager to the IdentityManager

Use identity::IdentityManager::HasPrimaryAccount() instead of
SigninManagerBase::IsAuthenticated, and remove unneeded includes.

Bug:  890826 
Change-Id: Iabe09231fa684e8249475ba9dcd8782d7ecd90d5
Reviewed-on: https://chromium-review.googlesource.com/c/1315969
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#605735}
[modify] https://crrev.com/05c32ab7198dc1aa6f87b5872b3e98195dede873/ios/chrome/browser/ui/settings/clear_browsing_data_manager.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b72eeec68ad1991b2f2989eb599e7486fe6a2b04

commit b72eeec68ad1991b2f2989eb599e7486fe6a2b04
Author: Mario Sanchez Prada <mario@igalia.com>
Date: Fri Nov 09 09:43:50 2018

Migrate clear_browsing_data_manager_unittest.mm to the Identity service

Use IdentityTestEnvironmentChromeBrowserStateAdaptor instead of manually
creating the browser's state by providing specific factories, and then
use the APIs from IdentityTestEnvironment, instead of SigninManagerBase.

Bug:  890826 
Change-Id: Id9d422e002d8fd2edc0ef1ad158f29e95c6dce64
Reviewed-on: https://chromium-review.googlesource.com/c/1318974
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606774}
[modify] https://crrev.com/b72eeec68ad1991b2f2989eb599e7486fe6a2b04/ios/chrome/browser/ui/settings/BUILD.gn
[modify] https://crrev.com/b72eeec68ad1991b2f2989eb599e7486fe6a2b04/ios/chrome/browser/ui/settings/clear_browsing_data_manager_unittest.mm