GitLab

This refactor will enable ProfilePicker to use
UserManagerProfileDialogDelegate for displaying force signin dialogs.

Bug: 1156096
Change-Id: I2ae84c3bc882b45aa0a016d28e182d11cc87a0de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2577220
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834651}