Switch to using AddTrack with stream labels

Bug: webrtc:8587
Change-Id: I8d4a3a225e6f6a6ae59def972ecae3255c0f2bda
Reviewed-on: https://webrtc-review.googlesource.com/37547
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Peter Thatcher <pthatcher@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21509}
diff --git a/pc/peerconnection.h b/pc/peerconnection.h
index a3797f4..3fd944c 100644
--- a/pc/peerconnection.h
+++ b/pc/peerconnection.h
@@ -88,7 +88,7 @@
   bool AddStream(MediaStreamInterface* local_stream) override;
   void RemoveStream(MediaStreamInterface* local_stream) override;
 
-  RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> AddTrackWithStreamLabels(
+  RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> AddTrack(
       rtc::scoped_refptr<MediaStreamTrackInterface> track,
       const std::vector<std::string>& stream_labels) override;
   rtc::scoped_refptr<RtpSenderInterface> AddTrack(