Add the override annotation to all necessary methods in .../quic/.

net/quic/crypto/aes_128_gcm_12_encrypter.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_AES_128_GCM_12_ENCRYPTER_H_
 #define NET_QUIC_CRYPTO_AES_128_GCM_12_ENCRYPTER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 16 matching lines @@
 // It uses an authentication tag of 12 bytes (96 bits). The fixed prefix
 // of the nonce is four bytes.
 class NET_EXPORT_PRIVATE Aes128Gcm12Encrypter : public QuicEncrypter {
  public:
   enum {
     // Authentication tags are truncated to 96 bits.
     kAuthTagSize = 12,
   };
 
   Aes128Gcm12Encrypter();
-  virtual ~Aes128Gcm12Encrypter();
+  virtual ~Aes128Gcm12Encrypter() OVERRIDE;
 
   // QuicEncrypter implementation
   virtual bool SetKey(base::StringPiece key) OVERRIDE;
   virtual bool SetNoncePrefix(base::StringPiece nonce_prefix) OVERRIDE;
   virtual bool Encrypt(base::StringPiece nonce,
                        base::StringPiece associated_data,
                        base::StringPiece plaintext,
                        unsigned char* output) OVERRIDE;
   virtual QuicData* EncryptPacket(QuicPacketSequenceNumber sequence_number,
                                   base::StringPiece associated_data,
@@ skipping 12 matching lines @@
   unsigned char nonce_prefix_[4];
 
 #if defined(USE_OPENSSL)
   ScopedEVPAEADCtx ctx_;
 #endif
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_AES_128_GCM_12_ENCRYPTER_H_