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A few cpp lint fixes, no functional changes.

Bug: 1010217
Change-Id: Ia08f6fe65e937d0155e3b25184d061d7bd736f76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412748Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: David Bienvenu <davidbienvenu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807615}