Move ProfileSyncServiceBundle away from low-level signin related objects

Remove any knowledge of AccountTrackerService, FakeSiginManager[Base],
FakeProfileOAuth2TokenService and FakeGaiaCookieManagerService from
ProfileSyncServiceBundle, and depend solely on IdentityTestEnvironment.

Bug: 886600
Change-Id: I268bc85d70c164efa3b9650565b9de13c98f4b4b
Reviewed-on: https://chromium-review.googlesource.com/c/1337618
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Mario Sanchez Prada <mario@igalia.com>
Cr-Commit-Position: refs/heads/master@{#608433}
3 files changed