Make DiversificationNonce a std::array

net/quic/core/quic_packet_generator.h

 // Copyright (c) 2012 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.
 //
 // Responsible for generating packets on behalf of a QuicConnection.
 // Packets are serialized just-in-time.  Control frames are queued.
 // Ack and Feedback frames will be requested from the Connection
 // just-in-time.  When a packet needs to be sent, the Generator
 // will serialize a packet and pass it to QuicConnection::SendOrQueuePacket()
 //
@@ skipping 114 matching lines @@
 
   // Whether the pending packet has no frames in it at the moment.
   bool IsPendingPacketEmpty() const;
 
   // Makes the framer not serialize the protocol version in sent packets.
   void StopSendingVersion();
 
   // SetDiversificationNonce sets the nonce that will be sent in each public
   // header of packets encrypted at the initial encryption level. Should only
   // be called by servers.
-  void SetDiversificationNonce(const DiversificationNonce nonce);
+  void SetDiversificationNonce(const DiversificationNonce& nonce);
 
   // Creates a version negotiation packet which supports |supported_versions|.
   // Caller owns the created  packet. Also, sets the entropy hash of the
   // serialized packet to a random bool and returns that value as a member of
   // SerializedPacket.
   QuicEncryptedPacket* SerializeVersionNegotiationPacket(
       const QuicVersionVector& supported_versions);
 
   // Re-serializes frames with the original packet's packet number length.
   // Used for retransmitting packets to ensure they aren't too long.
@@ skipping 70 matching lines @@
   // retransmitted.
   QuicAckFrame pending_ack_frame_;
   QuicStopWaitingFrame pending_stop_waiting_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketGenerator);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_GENERATOR_H_