a4c113afe1
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-Commit-Position: refs/heads/master@{#18819}