GitLab

This CL removes GaiaCookieManagerService, AccountTrackerService,
ProfileOAuth2TokenService, AccountFetcherService and SigninClient.

It also updates DomainsClearedOnBrowsingDataRemoved
and DomainsClearedOnBrowsingDataRemoved2 to use IdentityManager,
not GaiaCookieManagerService. It checks whether
OnAccountsInCookieUpdated() is triggered or not after
OnBrowsingDataRemoved() is called as it forces to call
OnCookieChange().

Bug: 797931
Change-Id: I247370add1ed670a8b2aad99c7905bbe655f5d63
Reviewed-on: https://chromium-review.googlesource.com/c/1488476Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#635947}