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Due to a recent refactoring, we were not creating the internal
plumbing needed to show popups anymore.

BUG=868238

Change-Id: I9ffcdff49a2c3a5f4de9dbda741986de765ad6a6
Reviewed-on: https://chromium-review.googlesource.com/1154039
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578942}