GitLab

Going forward the default API for interacting with authentication error
should be the token service rather than the SigninErrorController.
This CL updates tests to use the token service instead of
AuthErrorProvider to set authentication errors.

TBR=ellyjones

Bug: 836212
Change-Id: I694068a1d037b1f2314d389328b9ccbea5f2bcf3
Reviewed-on: https://chromium-review.googlesource.com/1016642
Commit-Queue: David Roger <droger@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553509}