Update API for Objective-C RTCAudioTrack and RTCVideoTrack.

webrtc/api/BUILD.gn

Index: webrtc/api/BUILD.gn
diff --git a/webrtc/api/BUILD.gn b/webrtc/api/BUILD.gn
index 3775ffe01358d03976f55b43b2a8b3337e1e6f4f..63ec23a53d242e8341dfb50f1bb8c8b9ee47ed6d 100644
--- a/webrtc/api/BUILD.gn
+++ b/webrtc/api/BUILD.gn
@@ -29,6 +29,9 @@ if (is_ios) {
     ]
     sources = [
       # Add these when there's a BUILD.gn for peer connection APIs
+      #"objc/RTCAudioTrack+Private.h",
+      #"objc/RTCAudioTrack.h",
+      #"objc/RTCAudioTrack.mm",s
       #"objc/RTCIceCandidate+Private.h",
       #"objc/RTCIceCandidate.h",
       #"objc/RTCIceCandidate.mm",
@@ -41,6 +44,9 @@ if (is_ios) {
       #"objc/RTCVideoSource+Private.h",
       #"objc/RTCVideoSource.h",
       #"objc/RTCVideoSource.mm",
+      #"objc/RTCVideoTrack+Private.h",
+      #"objc/RTCVideoTrack.h",
+      #"objc/RTCVideoTrack.mm",
       "objc/RTCIceServer+Private.h",
       "objc/RTCIceServer.h",
       "objc/RTCIceServer.mm",
@@ -59,6 +65,9 @@ if (is_ios) {
       "objc/RTCVideoFrame.h",
       "objc/RTCVideoFrame.mm",
       "objc/RTCVideoRenderer.h",
+      "objc/RTCVideoRendererAdapter+Private.h",
+      "objc/RTCVideoRendererAdapter.h",
+      "objc/RTCVideoRendererAdapter.mm",
       "objc/WebRTC-Prefix.pch",
     ]