Add config to prune TURN ports

webrtc/p2p/base/tcpport.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 43 matching lines @@
 
   void PrepareAddress() override;
 
   int GetOption(rtc::Socket::Option opt, int* value) override;
   int SetOption(rtc::Socket::Option opt, int value) override;
   int GetError() override;
   bool SupportsProtocol(const std::string& protocol) const override {
     return protocol == TCP_PROTOCOL_NAME || protocol == SSLTCP_PROTOCOL_NAME;
   }
 
+  ProtocolType GetProtocol() const override { return PROTO_TCP; }
+
  protected:
   TCPPort(rtc::Thread* thread,
           rtc::PacketSocketFactory* factory,
           rtc::Network* network,
           const rtc::IPAddress& ip,
           uint16_t min_port,
           uint16_t max_port,
           const std::string& username,
           const std::string& password,
           bool allow_listen);
@@ skipping 109 matching lines @@
 
   // Allow test case to overwrite the default timeout period.
   int reconnection_timeout_;
 
   friend class TCPPort;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_TCPPORT_H_