GitLab

Remove deprecated media engagement fields from the
chrome://media-engagement WebUI.

BUG=998892

Change-Id: I5dadab504404602c22c5773411816eb4c7518b71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1776398
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692071}