Standardize usage of virtual/override/final in net/

net/quic/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_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_piece.h"
 #include "net/base/net_export.h"
 #include "net/quic/crypto/key_exchange.h"
 
 #if defined(USE_OPENSSL)
 #include "crypto/openssl_util.h"
 #include "crypto/scoped_openssl_types.h"
 #else
 #include "crypto/ec_private_key.h"
 #include "crypto/scoped_nss_types.h"
 #endif
 
 namespace net {
 
 // P256KeyExchange implements a KeyExchange using elliptic-curve
 // Diffie-Hellman on NIST P-256.
 class NET_EXPORT_PRIVATE P256KeyExchange : public KeyExchange {
  public:
-  virtual ~P256KeyExchange();
+  ~P256KeyExchange() override;
 
   // New creates a new key exchange object from a private key. If
   // |private_key| is invalid, nullptr is returned.
   static P256KeyExchange* New(base::StringPiece private_key);
 
   // |NewPrivateKey| returns a private key, suitable for passing to |New|.
   // If |NewPrivateKey| can't generate a private key, it returns an empty
   // string.
   static std::string NewPrivateKey();
 
   // KeyExchange interface.
-  virtual KeyExchange* NewKeyPair(QuicRandom* rand) const override;
-  virtual bool CalculateSharedKey(const base::StringPiece& peer_public_value,
-                                  std::string* shared_key) const override;
-  virtual base::StringPiece public_value() const override;
-  virtual QuicTag tag() const override;
+  KeyExchange* NewKeyPair(QuicRandom* rand) const override;
+  bool CalculateSharedKey(const base::StringPiece& peer_public_value,
+                          std::string* shared_key) const override;
+  base::StringPiece public_value() const override;
+  QuicTag tag() const override;
 
  private:
   enum {
     // A P-256 field element consists of 32 bytes.
     kP256FieldBytes = 32,
     // A P-256 point in uncompressed form consists of 0x04 (to denote
     // that the point is uncompressed) followed by two, 32-byte field
     // elements.
     kUncompressedP256PointBytes = 1 + 2 * kP256FieldBytes,
     // The first byte in an uncompressed P-256 point.
@@ skipping 14 matching lines @@
   scoped_ptr<crypto::ECPrivateKey> key_pair_;
 #endif
   // The public key stored as an uncompressed P-256 point.
   uint8 public_key_[kUncompressedP256PointBytes];
 
   DISALLOW_COPY_AND_ASSIGN(P256KeyExchange);
 };
 
 }  // namespace net
 #endif  // NET_QUIC_CRYPTO_P256_KEY_EXCHANGE_H_