Update prflx candidates' generation when setting ICE credentials.

webrtc/p2p/base/candidate.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 231 matching lines @@
   }
 
  private:
   std::string ToStringInternal(bool sensitive) const {
     std::ostringstream ost;
     std::string address = sensitive ? address_.ToSensitiveString() :
                                       address_.ToString();
     ost << "Cand[" << transport_name_ << ":" << foundation_ << ":" << component_
         << ":" << protocol_ << ":" << priority_ << ":" << address << ":"
         << type_ << ":" << related_address_ << ":" << username_ << ":"
-        << password_ << ":" << network_id_ << ":" << network_cost_ << "]";
+        << password_ << ":" << network_id_ << ":" << network_cost_ << ":"
+        << generation_ << "]";
     return ost.str();
   }
 
   std::string id_;
   int component_;
   std::string protocol_;
   std::string relay_protocol_;
   rtc::SocketAddress address_;
   uint32_t priority_;
   std::string username_;
@@ skipping 18 matching lines @@
   virtual ~CandidateTranslator() {}
   virtual bool GetChannelNameFromComponent(
       int component, std::string* channel_name) const = 0;
   virtual bool GetComponentFromChannelName(
       const std::string& channel_name, int* component) const = 0;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_CANDIDATE_H_