GitLab

If addition of secondary accounts is disabled, an error page should be
displayed instead of Gaia sign-in screen.

Bug: 987218
Change-Id: I2954adddf8ece06ca9a0cf355539781e23817d42
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1731891Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Commit-Queue: Anastasiia Nikolaienko <anastasiian@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697637}