iOS: Add new RTCVideoSource interface

webrtc/sdk/BUILD.gn

Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index a789efb57e4c668a7b12b3f9e5539c067e519d9a..55389380a101b7cde28bca9a1157025fcfb6d3c9 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -148,6 +148,7 @@ if (is_ios || is_mac) {
       "objc/Framework/Classes/RTCShader+Private.h",
       "objc/Framework/Classes/RTCShader.h",
       "objc/Framework/Classes/RTCShader.mm",
+      "objc/Framework/Classes/RTCVideoCapturer.mm",
       "objc/Framework/Classes/RTCVideoFrame+Private.h",
       "objc/Framework/Classes/RTCVideoFrame.mm",
       "objc/Framework/Classes/RTCVideoRendererAdapter+Private.h",
@@ -161,6 +162,8 @@ if (is_ios || is_mac) {
       "objc/Framework/Classes/avfoundationformatmapper.mm",
       "objc/Framework/Classes/avfoundationvideocapturer.h",
       "objc/Framework/Classes/avfoundationvideocapturer.mm",
+      "objc/Framework/Classes/objcvideotracksource.h",
+      "objc/Framework/Classes/objcvideotracksource.mm",
       "objc/Framework/Classes/videotoolboxvideocodecfactory.cc",
       "objc/Framework/Classes/videotoolboxvideocodecfactory.h",
       "objc/Framework/Headers/WebRTC/RTCAVFoundationVideoSource.h",
@@ -184,6 +187,7 @@ if (is_ios || is_mac) {
       "objc/Framework/Headers/WebRTC/RTCRtpReceiver.h",
       "objc/Framework/Headers/WebRTC/RTCRtpSender.h",
       "objc/Framework/Headers/WebRTC/RTCSessionDescription.h",
+      "objc/Framework/Headers/WebRTC/RTCVideoCapturer.h",
       "objc/Framework/Headers/WebRTC/RTCVideoFrame.h",
       "objc/Framework/Headers/WebRTC/RTCVideoRenderer.h",
       "objc/Framework/Headers/WebRTC/RTCVideoSource.h",