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This is needed in order to include the view of extension permissions in
other dialogs, for example the upcoming parent-permission dialog for
child extension installation.

Bug: 1019908
Change-Id: I82bbf76cb8622fa555c968fd2e6a1f473033c534
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1952525
Commit-Queue: Dan S <danan@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#723514}