Fix IPv6 support issue.

webrtc/p2p/base/turnport.h

Index: webrtc/p2p/base/turnport.h
diff --git a/webrtc/p2p/base/turnport.h b/webrtc/p2p/base/turnport.h
index 17d2d45181930bcc1ce9bb8ba8a75b0cf03225d4..f63044e47222c039227806834dbc976c140d941a 100644
--- a/webrtc/p2p/base/turnport.h
+++ b/webrtc/p2p/base/turnport.h
@@ -86,6 +86,7 @@ class TurnPort : public Port {
   virtual void PrepareAddress();
   virtual Connection* CreateConnection(
       const Candidate& c, PortInterface::CandidateOrigin origin);
+
   virtual int SendTo(const void* data, size_t size,
                      const rtc::SocketAddress& addr,
                      const rtc::PacketOptions& options,
@@ -201,6 +202,8 @@ class TurnPort : public Port {
       UpdateHash();
     }
   }
+  bool AddressFamilyMatch(const Candidate& local_candidate,
+                          const Candidate& remote_candidate) const;
 
   void OnTurnRefreshError();
   bool SetAlternateServer(const rtc::SocketAddress& address);