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 d5ad65f08100efb9d55cce2ff5e62c17579a284d..095e01e4c74aa3c2a626c38b88f0c814a6167b0d 100644
--- a/webrtc/p2p/base/port.h
+++ b/webrtc/p2p/base/port.h
@@ -592,9 +592,8 @@ 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