Added DISALLOW_COPY_AND_ASSIGN to disable copy/assign.

net/quic/crypto/scoped_evp_aead_ctx.h

 // Copyright 2014 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_SCOPED_EVP_AEAD_CTX_H_
 #define NET_QUIC_CRYPTO_SCOPED_EVP_AEAD_CTX_H_
 
 #include <openssl/evp.h>
 
+#include "base/basictypes.h"
+
 namespace net {
 
 // ScopedEVPAEADCtx manages an EVP_AEAD_CTX object and calls the needed cleanup
 // functions when it goes out of scope.
 class ScopedEVPAEADCtx {
  public:
   ScopedEVPAEADCtx();
   ~ScopedEVPAEADCtx();
 
   EVP_AEAD_CTX* get();
 
  private:
   EVP_AEAD_CTX ctx_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedEVPAEADCtx);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_SCOPED_EVP_AEAD_CTX_H_