Reason for revert:
This breaks remoting_unittests on Windows in Chromium:
[5116:2536:0404/012329:5457156:ERROR:webrtcsession.cc(1388)] ConnectDataChannel called when data_channel_ is NULL.
[5116:2536:0404/012329:5457187:ERROR:opensslidentity.cc(154)] Generating certificate: error:0c000071:ASN.1 encoding routines:OPENSSL_internal:ERROR_GETTING_TIME
[5116:2536:0404/012329:5457218:ERROR:opensslidentity.cc(154)] Generating certificate: error:0c000071:ASN.1 encoding routines:OPENSSL_internal:ERROR_GETTING_TIME
[5116:2536:0404/012329:5457218:WARNING:dtlsidentitystore.cc(221)] Failed to generate DTLS identity.
[
Original issue's description:
> Set defines for Chromium build.
>
> Copy the defines from the target_defaults section of Chromium's
> src/third_party/libjingle.gyp into our webrtc/build/common.gypi
> in order to ensure the same defines are used for the Chromium build
> when removing the source listings in src/third_party/libjingle.gyp.
> With this CL landed, it should be possible to replace them with
> dependencies on:
> * webrtc/api/api.gyp:libjingle_peerconnections
> * webrtc/media/media.gyp:rtc_media
> * webrtc/pc/pc.gyp:rtc_pc
> * webrtc/pp2/p2p.gyp:rtc_p2p
> * webrtc/libjingle/xmpp/xmpp.gyp:rtc_xmpp
>
> Not ported (Windows specific):
> * Precompiled headers (build/win_precompile.gypi):
> since it only seems to offer a compile speedup. Will be landed
> for all of WebRTC in separate CL.
>
> BUG=webrtc:4256
> NOTRY=True
> R=perkj@webrtc.org, tommi@webrtc.org
>
> Committed: 9266cc0668TBR=perkj@webrtc.org,tommi@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:4256
Review URL: https://codereview.webrtc.org/1861603002
Cr-Commit-Position: refs/heads/master@{#12229}
602f41e2ed