This should have been a part of https://codereview.webrtc.org/1413333002/ The header guard PRESUBMIT rule is being enabled in https://codereview.webrtc.org/1419203005 so things like this won't happen in the future. BUG=5095 NOTRY=True Review URL: https://codereview.webrtc.org/1425693005 Cr-Commit-Position: refs/heads/master@{#10475}