Add more out of line copy ctors for complex classes.

blimp/client/session/assignment_source.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 BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_
 #define BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 27 matching lines @@
 // An Assignment contains the configuration data needed for a client
 // to connect to the engine.
 struct BLIMP_CLIENT_EXPORT Assignment {
   enum TransportProtocol {
     UNKNOWN = 0,
     SSL = 1,
     TCP = 2,
   };
 
   Assignment();
+  Assignment(const Assignment& other);
   ~Assignment();
 
   // Returns true if the net::IPEndPoint has an unspecified IP, port, or
   // transport protocol.
   bool IsValid() const;
 
   // Specifies the transport to use to connect to the engine.
   TransportProtocol transport_protocol;
 
   // Specifies the IP address and port on which to reach the engine.
@@ skipping 68 matching lines @@
 
   base::WeakPtrFactory<AssignmentSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AssignmentSource);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_SESSION_ASSIGNMENT_SOURCE_H_