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This CL handles launching selected profile from the profile picker and
then closing the picker.

Bug: 1063856
Change-Id: I5bfd15a115503dad2749f21f159cb8df25ed0a05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2279890
Commit-Queue: Monica Basta <msalama@chromium.org>
Reviewed-by: Esmael Elmoslimany <aee@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#785772}