Reason for revert:
Apparently breaks Chromium compile for unknown reason:
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Linux%20Builder/builds/12314
Original issue's description:
> Refactor webrtc/modules/desktop_capture for GN check
>
> This moves some GN check configurations out of .gn to individual
> targets.
>
> The now checked target is:
> "//webrtc/modules/desktop_capture/*"
>
> BUG=webrtc:6828
> NOTRY=True
>
> Review-Url: https://codereview.webrtc.org/2593713002
> Cr-Commit-Position: refs/heads/master@{#15725}
> Committed: 70870b9211TBR=sergeyu@chromium.org,mbonadei@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/2597923002
Cr-Commit-Position: refs/heads/master@{#15750}
d943c48454