Revert the revert in r2988 since that wasn't the issue.
Review URL: https://webrtc-codereview.appspot.com/931005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@2992 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/video_engine/vie_channel_manager.h b/video_engine/vie_channel_manager.h
index 2409751..04bd37a 100644
--- a/video_engine/vie_channel_manager.h
+++ b/video_engine/vie_channel_manager.h
@@ -79,6 +79,10 @@
   // adding a channel.
   bool SetBandwidthEstimationMode(BandwidthEstimationMode mode);
 
+  // Updates the SSRCs for a channel. If one of the SSRCs already is registered,
+  // it will simply be ignored and no error is returned.
+  void UpdateSsrcs(int channel_id, const std::list<unsigned int>& ssrcs);
+
  private:
   // Creates a channel object connected to |vie_encoder|. Assumed to be called
   // protected.