No behavior change since that warning isn't enabled anywhere yet, and
it's opt-in.  This is a prerequisite for
https://chromium-review.googlesource.com/c/chromium/src/+/895726

Bug: chromium:177475

Change-Id: Ie5ffccd240a65646fe07e7d4475f63c4e8620746
Reviewed-on: https://chromium-review.googlesource.com/895728Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>