This should have been a part of https://codereview.webrtc.org/1740873003/ but wasn't discovered since we cannot have --check turned on for GN yet. BUG=webrtc:5589 TBR=solenberg@webrtc.org, henrika@webrtc.org, Review URL: https://codereview.webrtc.org/1744123002 . Cr-Commit-Position: refs/heads/master@{#11803}