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}