f137e97adb
Also needed to revert these CLs, which removed code used by the
code being un-removed:
https://codereview.webrtc.org/2745523004
https://codereview.webrtc.org/2754033003
https://codereview.webrtc.org/2758943002
Reason for revert:
This code is still being used by native application developers, so we should send a PSA announcing the deprecation and suggest an alternative before removing it.
Original issue's description:
> Removing HTTPS and SOCKS proxy server code.
>
> This isn't used any more so there's no point in maintaining it.
>
> BUG=None
>
> Review-Url: https://codereview.webrtc.org/2731673002
> Cr-Commit-Position: refs/heads/master@{#17016}
> Committed: a1991c5175
TBR=pthatcher@webrtc.org
NOPRESUBMIT=true
NOTRY=true
BUG=None
Review-Url: https://codereview.webrtc.org/2766063005
Cr-Commit-Position: refs/heads/master@{#17369}