Fix include guards for QUIC files.

net/quic/core/crypto/p256_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_P256_KEY_EXCHANGE_H_
-#define NET_QUIC_CRYPTO_P256_KEY_EXCHANGE_H_
+#ifndef NET_QUIC_CORE_CRYPTO_P256_KEY_EXCHANGE_H_
+#define NET_QUIC_CORE_CRYPTO_P256_KEY_EXCHANGE_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "crypto/openssl_util.h"
 #include "net/base/net_export.h"
@@ skipping 42 matching lines @@
                   const uint8_t* public_key);
 
   bssl::UniquePtr<EC_KEY> private_key_;
   // The public key stored as an uncompressed P-256 point.
   uint8_t public_key_[kUncompressedP256PointBytes];
 
   DISALLOW_COPY_AND_ASSIGN(P256KeyExchange);
 };
 
 }  // namespace net
-#endif  // NET_QUIC_CRYPTO_P256_KEY_EXCHANGE_H_
+#endif  // NET_QUIC_CORE_CRYPTO_P256_KEY_EXCHANGE_H_