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Not all code in the file needs to be visible to the outside. Also use
the appropriate naming style for functions.

Change-Id: I4f22df2932954b71ce65232a019cfcddd5fd408b
Reviewed-on: https://chromium-review.googlesource.com/c/1336521Reviewed-by: Alex Moshchuk <alexmos@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608215}