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This will be plumbed to Files App UI where a dialog can be displayed.

Bug: 1166058
Change-Id: I4f271a0b4eb3002e430f5dbd127ebb8a8e844503
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626813Reviewed-by: Sam McNally <sammc@chromium.org>
Reviewed-by: Sergei Datsenko <dats@chromium.org>
Commit-Queue: Austin Tankiang <austinct@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843826}