Make the auto-signin view a standalone dialog.

Breaks out ManagePasswordAutoSignInView from ManagePasswordsBubbleView.

Bug: chromium:654115
Change-Id: Ic99757b1365eb77d754b8dfb3b079c5efad23783
Reviewed-on: https://chromium-review.googlesource.com/865461
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#529537}
5 files changed