Add a Clone method to ProofVerifyDetails to allow for the proof verify

net/quic/crypto/proof_verifier.h

 // Copyright (c) 2013 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 NET_QUIC_CRYPTO_PROOF_VERIFIER_H_
 #define NET_QUIC_CRYPTO_PROOF_VERIFIER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
 #include "net/quic/quic_types.h"
 
 namespace net {
 
 // ProofVerifyDetails is an abstract class that acts as a container for any
 // implementation specific details that a ProofVerifier wishes to return. These
 // details are saved in the CachedState for the origin in question.
 class NET_EXPORT_PRIVATE ProofVerifyDetails {
  public:
   virtual ~ProofVerifyDetails() {}
+
+  // Returns an new ProofVerifyDetails object with the same contents
+  // as this one.
+  virtual ProofVerifyDetails* Clone() const = 0;
 };
 
 // ProofVerifyContext is an abstract class that acts as a container for any
 // implementation specific context that a ProofVerifier needs.
 class NET_EXPORT_PRIVATE ProofVerifyContext {
  public:
   virtual ~ProofVerifyContext() {}
 };
 
 // ProofVerifierCallback provides a generic mechanism for a ProofVerifier to
@@ skipping 42 matching lines @@
                                       const std::string& signature,
                                       const ProofVerifyContext* context,
                                       std::string* error_details,
                                       scoped_ptr<ProofVerifyDetails>* details,
                                       ProofVerifierCallback* callback) = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_PROOF_VERIFIER_H_