Prevent unsafe narrowing: [base/]third_party

Bug: 1292951
Change-Id: I2abf06d175f79169e7a324f0466574c314b7150c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3717978
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Erik Staab <estaab@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Erik Staab <estaab@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1017816}
NOKEYCHECK=True
GitOrigin-RevId: 38e34d99eaf86cb8a10748ef4b0416059286fc32
2 files changed