GitLab

Move account_manager_* and account_migration_* files to
ui/webui/chromeos/account_manager.

Bug: 1083147
Change-Id: I2f61237cf4b781a8ddd0ed8837e690e7f59adac1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2207226
Commit-Queue: Anastasiia N <anastasiian@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772224}