Move shared files in net/quic/ into net/quic/core/

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/macros.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_