Pick the DTLS handshake timeout based on the ICE RTT estimate

webrtc/p2p/base/icetransportinternal.h

 /*
  *  Copyright 2016 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 85 matching lines @@
 
   virtual void AddRemoteCandidate(const Candidate& candidate) = 0;
 
   virtual void RemoveRemoteCandidate(const Candidate& candidate) = 0;
 
   virtual IceGatheringState gathering_state() const = 0;
 
   // Returns the current stats for this connection.
   virtual bool GetStats(ConnectionInfos* infos) = 0;
 
+  // Returns RTT estimate over the currently active connection, or an empty
+  // rtc::Optional if there is none.
+  virtual rtc::Optional<int> GetRttEstimate() = 0;
+
   sigslot::signal1<IceTransportInternal*> SignalGatheringState;
 
   // Handles sending and receiving of candidates.
   sigslot::signal2<IceTransportInternal*, const Candidate&>
       SignalCandidateGathered;
 
   sigslot::signal2<IceTransportInternal*, const Candidates&>
       SignalCandidatesRemoved;
 
   // Deprecated by SignalSelectedCandidatePairChanged
@@ skipping 23 matching lines @@
 
   // Debugging description of this transport.
   std::string debug_name() const override {
     return transport_name() + " " + std::to_string(component());
   }
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_ICETRANSPORTINTERNAL_H_