Update API for Objective-C RTCAudioTrack and RTCVideoTrack.

webrtc/api/objc/RTCAudioTrack+Private.h

Index: webrtc/api/objc/RTCAudioTrack+Private.h
diff --git a/webrtc/api/objc/RTCIceServer+Private.h b/webrtc/api/objc/RTCAudioTrack+Private.h
similarity index 63%
copy from webrtc/api/objc/RTCIceServer+Private.h
copy to webrtc/api/objc/RTCAudioTrack+Private.h
index 59f5a92dffa10d313b3cdf98c9e2ca0edc081f1a..d3a9fc715cba9c10a7d80483e64fa5c2c3c01f39 100644
--- a/webrtc/api/objc/RTCIceServer+Private.h
+++ b/webrtc/api/objc/RTCAudioTrack+Private.h
@@ -8,20 +8,20 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import "RTCIceServer.h"
+#import "RTCAudioTrack.h"
 
-#include "talk/app/webrtc/peerconnectioninterface.h"
+#include "talk/app/webrtc/mediastreaminterface.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface RTCIceServer ()
+@interface RTCAudioTrack ()
 
 /**
- * IceServer struct representation of this RTCIceServer object's data.
- * This is needed to pass to the underlying C++ APIs.
+ * AudioTrack representation of this RTCAudioTrack object. This is needed to
+ * pass to the underlying C++ APIs.
  */
 @property(nonatomic, readonly)
-    webrtc::PeerConnectionInterface::IceServer iceServer;
+    rtc::scoped_refptr<webrtc::AudioTrackInterface> nativeAudioTrack;
 
 @end