Fix cpplint errors in locations that are already being checked

Otherwise cpplint will trigger during presubmit for unrelated changes
in these files.

BUG=webrtc:5149
NOTRY=True

Review-Url: https://codereview.webrtc.org/2767393003
Cr-Original-Commit-Position: refs/heads/master@{#17371}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 60c5668f1ee15d4fe1e82fb78ae58aa68f11a0f7
4 files changed