GitLab

For signed-in new users, if they chose an email provider on a previous step,
they would be prompted by a page which will direct them to the selected
email provider url.

Change-Id: Iccf0f61c0548923f63e022e66e408bf3595d54f1
Reviewed-on: https://chromium-review.googlesource.com/c/1256213
Commit-Queue: Scott Chen <scottchen@chromium.org>
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601820}