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These arguments are essentially mandatory and call sites set both of
them.

Bug: 1106422
Change-Id: I85483306b70509e3b5cd0db5559179c88bc97b03
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2417062
Auto-Submit: Peter Boström <pbos@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808355}