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

net/quic/crypto/curve25519_key_exchange.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_CURVE25519_KEY_EXCHANGE_H_
-#define NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_
-
-#include <stdint.h>
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/strings/string_piece.h"
-#include "net/base/net_export.h"
-#include "net/quic/crypto/key_exchange.h"
-
-namespace net {
-
-class QuicRandom;
-
-// Curve25519KeyExchange implements a KeyExchange using elliptic-curve
-// Diffie-Hellman on curve25519. See http://cr.yp.to/ecdh.html
-class NET_EXPORT_PRIVATE Curve25519KeyExchange : public KeyExchange {
- public:
-  ~Curve25519KeyExchange() override;
-
-  // New creates a new object from a private key. If the private key is
-  // invalid, nullptr is returned.
-  static Curve25519KeyExchange* New(base::StringPiece private_key);
-
-  // NewPrivateKey returns a private key, generated from |rand|, suitable for
-  // passing to |New|.
-  static std::string NewPrivateKey(QuicRandom* rand);
-
-  // KeyExchange interface.
-  KeyExchange* NewKeyPair(QuicRandom* rand) const override;
-  bool CalculateSharedKey(base::StringPiece peer_public_value,
-                          std::string* shared_key) const override;
-  base::StringPiece public_value() const override;
-  QuicTag tag() const override;
-
- private:
-  Curve25519KeyExchange();
-
-  uint8_t private_key_[32];
-  uint8_t public_key_[32];
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_CRYPTO_CURVE25519_KEY_EXCHANGE_H_