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This is the only user of these functions, and they're not
"shelf"-related in any particular way.

(No code changes to the functions themselves.)

Bug: none
Change-Id: Idfd321b09fd9926f27523710cca0a3f209e35835
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251053
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Xing Liu <xingliu@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779936}