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The provided implementations are the same as the default, so just use
default.

Bug: None
Change-Id: Ie4c772a6371805cd869673b9979983cfa7714f29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2249284Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Anand K Mistry <amistry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779563}