Support building WebRTC without audio and video for IOS.
Reorganized the targets in webrtc/sdk/BUILD.gn so that the applications which use
WebRTC DataChannel only can depend on the "peerconnection_factory_no_media"
instead of "rtc_sdk_objc" to reduce the binary size.
Provided a no-media implementation of RTCPeerConnectionFactory using the macro
"HAVE_NO_MEDIA".
BUG=webrtc:7613
Review-Url: https://codereview.webrtc.org/2944643002
Cr-Original-Commit-Position: refs/heads/master@{#18819}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: a4c113afe1378f00b791971b0ce28f4a06f312ac
2 files changed
