Deleted unused method EstimateMTU, and the WinPing class.

webrtc/base/physicalsocketserver.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 133 matching lines @@
   int RecvFrom(void* buffer,
                size_t length,
                SocketAddress* out_addr,
                int64_t* timestamp) override;
 
   int Listen(int backlog) override;
   AsyncSocket* Accept(SocketAddress* out_addr) override;
 
   int Close() override;
 
-  int EstimateMTU(uint16_t* mtu) override;
-
   SocketServer* socketserver() { return ss_; }
 
  protected:
   int DoConnect(const SocketAddress& connect_addr);
 
   // Make virtual so ::accept can be overwritten in tests.
   virtual SOCKET DoAccept(SOCKET socket, sockaddr* addr, socklen_t* addrlen);
 
   // Make virtual so ::send can be overwritten in tests.
   virtual int DoSend(SOCKET socket, const char* buf, int len, int flags);
@@ skipping 54 matching lines @@
   static int next_id_;
   int id_;
   bool signal_close_;
   int signal_err_;
 #endif // WEBRTC_WIN
 };
 
 } // namespace rtc
 
 #endif // WEBRTC_BASE_PHYSICALSOCKETSERVER_H__