Reason for revert:
Nope, breaks chromium
Original issue's description:
> Fix inconsistent setting of the rtc_include_unittests flag.
>
> On advice from brettw, se discussion here:
> https://codereview.webrtc.org/2149543002/
>
> The problem was we were setting the flag to both false and true,
> and the the true happened to win out for WebRTC checkouts and
> false for Chromium checkouts. This change should make this
> mechanic more obvious.
>
> This change _should_ have no effect downstream.
>
> Doing tbr to see if we can get the chromium import back into a good state today.
>
> TBR=tommi@webrtc.org
>
> Committed: https://crrev.com/9d34148714773339a4e8396bd28aceb571554d36
> Cr-Commit-Position: refs/heads/master@{#13484}
TBR=tommi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review-Url: https://codereview.webrtc.org/2150293002
Cr-Commit-Position: refs/heads/master@{#13486}
136778252d