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This adds a PermissionWizard::Delegate implementation which runs the
Me2Me or IT2Me binary with a command-line for checking permissions.

This can be used to create a PermissionWizard which checks the
permissions on either the ME2ME or IT2ME host.

Bug: 1015201
Change-Id: I24f24e5b1928608bbf310b33a6802db86c9f80bc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1903934Reviewed-by: Gary Kacmarcik <garykac@chromium.org>
Commit-Queue: Lambros Lambrou <lambroslambrou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714621}