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Note that I have not exposed the public interface yet since I want to
make sure this is sound before migrating consumers over to this method.

Bug: 1036490
Change-Id: Id44d5f09a17287a2ba28eb7593ebd41ff082bd5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2024164Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736217}