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This CL adds several methods to ProfilePicker and ProfilePickerView that
allow the profile picker to display UserManagerProfileDialogs.

Bug: 1156096
Change-Id: I28e4ac97ea878e69b760f32a3e1afb828049d498
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2582060Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835682}