components: Add out-of-line copy ctors for complex classes.

components/proximity_auth/cryptauth/secure_message_delegate.h

 // Copyright 2015 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 COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H
 #define COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H
 
 #include <string>
 
 #include "base/callback_forward.h"
 #include "components/proximity_auth/cryptauth/proto/securemessage.pb.h"
 
 namespace proximity_auth {
 
 // Interface of delegate responsible for cryptographic operations based on the
 // secure message library. This interface is asynchronous as the current
 // implementation on ChromeOS communicates with a daemon process over IPC.
 class SecureMessageDelegate {
  public:
   // Fields specifying how to create a SecureMessage.
   struct CreateOptions {
     CreateOptions();
+    CreateOptions(const CreateOptions& other);
     ~CreateOptions();
 
     // The scheme used to encrypt the message.
     securemessage::EncScheme encryption_scheme;
     // The scheme used to sign the message.
     securemessage::SigScheme signature_scheme;
     // Additional data that is used as part of the signature computation but not
     // included in the message contents.
     std::string associated_data;
     // Plain-text data included in the message header.
@@ skipping 59 matching lines @@
   virtual void UnwrapSecureMessage(
       const std::string& serialized_message,
       const std::string& key,
       const UnwrapOptions& unwrap_options,
       const UnwrapSecureMessageCallback& callback) = 0;
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_SECURE_MESSAGE_DELEGATE_H