GitLab

Return a valid TabSpecificContentSettingsDelegate from
PageInfoControllerDelegateImpl and add a browsertest to verify the same.

Bug: 1052375
Change-Id: I60db31480fbefc46b48851891ffaa0d977c7fdc4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2170349
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#763440}