Add signaling to support ICE renomination.

webrtc/p2p/base/port.h

Index: webrtc/p2p/base/port.h
diff --git a/webrtc/p2p/base/port.h b/webrtc/p2p/base/port.h
index f94972fb9daa93bc7e76c0096d8743ff7a4b0ca4..f1ded9cf7050efd84f7837d1023856ab60f5d0d3 100644
--- a/webrtc/p2p/base/port.h
+++ b/webrtc/p2p/base/port.h
@@ -593,9 +593,8 @@ class Connection : public CandidatePairInterface,
   // candidate's password and/or ufrag has not been set.
   // |remote_ice_parameters| should be a list of known ICE parameters ordered
   // by generation.
-  void MaybeSetRemoteIceCredentialsAndGeneration(const std::string& ice_ufrag,
-                                                 const std::string& ice_pwd,
-                                                 int generation);
+  void MaybeSetRemoteIceParametersAndGeneration(const IceParameters& params,
+                                                int generation);
 
   // If |remote_candidate_| is peer reflexive and is equivalent to
   // |new_candidate| except the type, update |remote_candidate_| to