Add more out of line copy ctors for complex classes.

remoting/protocol/ice_config.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_ICE_CONFIG_H_
 #define REMOTING_PROTOCOL_ICE_CONFIG_H_
 
 #include <string>
 #include <vector>
 
 #include "base/time/time.h"
 #include "third_party/webrtc/base/socketaddress.h"
 #include "third_party/webrtc/p2p/base/portallocator.h"
 
 namespace remoting {
 namespace protocol {
 
 struct IceConfig {
   IceConfig();
+  IceConfig(const IceConfig& other);
   ~IceConfig();
 
   bool is_null() const { return expiration_time.is_null(); }
 
   // Time when the config will stop being valid and need to be refreshed.
   base::Time expiration_time;
 
   std::vector<rtc::SocketAddress> stun_servers;
 
   // Legacy GTURN relay servers.
   std::vector<std::string> relay_servers;
   std::string relay_token;
 
   // Standard TURN servers
   std::vector<cricket::RelayServerConfig> turn_servers;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_ICE_CONFIG_H_