Reason for revert:
It is breaking a downstream bot.
Original issue's description:
> Enabling 'gn check' on //webrtc/test.
>
> BUG=webrtc:6828
> NOTRY=True
>
> Review-Url: https://codereview.webrtc.org/2796363003
> Cr-Commit-Position: refs/heads/master@{#17689}
> Committed: b41445858eTBR=kjellander@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6828
Review-Url: https://codereview.webrtc.org/2817003002
Cr-Commit-Position: refs/heads/master@{#17690}