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It had some layering workarounds in the past for cocoa, but it can
now be a component for better code health.

Bug: 828273
Change-Id: Iaa84cc4cdbb466ba696b7322e6f7f7d6ab914002
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1933827Reviewed-by: Mike Wittman <wittman@chromium.org>
Commit-Queue: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718881}