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It's been launched and on by default for a while now. Just noticed there
were some references to it laying around, so this cleans them up.

Change-Id: I9cd0a509a28c778e3efb92b9617a6c8948764017
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2467008
Commit-Queue: Ted Meyer <tmathmeyer@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816722}