Update prflx candidates' generation when setting ICE credentials.

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 7c4468d2e6b7d112abf7a4b93f41b9645e5f86c3..709bd26b178c0b689148c9a8b05bd21e4bae4fc2 100644
--- a/webrtc/p2p/base/port.h
+++ b/webrtc/p2p/base/port.h
@@ -108,6 +108,18 @@ struct ProtocolAddress {
       : address(a), proto(p), secure(sec) { }
 };
 
+struct IceParameters {
+  std::string ufrag;
+  std::string pwd;
+  IceParameters(const std::string& ice_ufrag, const std::string& ice_pwd)
+      : ufrag(ice_ufrag), pwd(ice_pwd) {}
+
+  bool operator==(const IceParameters& other) {
+    return ufrag == other.ufrag && pwd == other.pwd;
+  }
+  bool operator!=(const IceParameters& other) { return !(*this == other); }
+};
+
 typedef std::set<rtc::SocketAddress> ServerAddresses;
 
 // Represents a local communication mechanism that can be used to create
@@ -574,6 +586,14 @@ class Connection : public CandidatePairInterface,
 
   uint32_t ComputeNetworkCost() const;
 
+  // Update the ICE password and/or generation of the remote candidate if a
+  // ufrag in |remote_ice_parameters| matches the candidate's ufrag, and the
+  // 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::vector<IceParameters>& remote_ice_parameters);
+
   // Update the ICE password of the remote candidate if |ice_ufrag| matches
   // the candidate's ufrag, and the candidate's passwrod has not been set.
   void MaybeSetRemoteIceCredentials(const std::string& ice_ufrag,