GitLab

Move `InlineLoginDialogChromeOS::Source` to
`account_manager::AccountManagerFacade::AccountAdditionSource`.

`AccountAdditionSource` is used for UMA stats, which will be sent by
`AccountManagerFacade`. Currently they are sent by
`InlineLoginDialogChromeOS::ShowDeprecated`, but these methods will be
removed.

Note: `InlineLoginDialogChromeOSOnboarding` will keep sending the UMA
stats because it is a different dialog.

Bug: 1140469
Change-Id: I652fb807b3285181e8b43ad0560983d1e3a8764e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550668
Commit-Queue: Anastasiia N <anastasiian@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Kush Sinha <sinhak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835661}