Compilerwarning possible loss of data in file port.h

webrtc/p2p/base/port.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 675 matching lines @@
   int64_t last_ping_response_received_;
   int64_t receiving_unchanged_since_ = 0;
   std::vector<SentPing> pings_since_last_response_;
 
   void MaybeAddPrflxCandidate(ConnectionRequest* request,
                               StunMessage* response);
 
   bool reported_;
   State state_;
   // Time duration to switch from receiving to not receiving.
-  int receiving_timeout_;
+  int64_t receiving_timeout_;

[honghaiz3, 2016/08/10 17:09:23]

This is a delta-time, so 32 bits should be sufficient. 
Can you just change the int64_t to int in set_receiving_timeout?
 

   int64_t time_created_ms_;
   int num_pings_sent_ = 0;
 
   friend class Port;
   friend class ConnectionRequest;
 };
 
 // ProxyConnection defers all the interesting work to the port.
 class ProxyConnection : public Connection {
  public:
   ProxyConnection(Port* port, size_t index, const Candidate& remote_candidate);
 
   int Send(const void* data,
            size_t size,
            const rtc::PacketOptions& options) override;
   int GetError() override { return error_; }
 
  private:
   int error_ = 0;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_PORT_H_