This is not defined anywhere, including chromium. Bug: None Change-Id: If5e89880570a80dd5720e48ebaefb0eb2c37fab3 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/215360 Reviewed-by: Jamie Walch <jamiewalch@chromium.org> Commit-Queue: Jamie Walch <jamiewalch@chromium.org> Cr-Commit-Position: refs/heads/master@{#34105}