Cache the value of GetMaxPlaintextSize in QuicPacketCreator. No functional change.

net/quic/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 160 matching lines @@
   // Called when the FEC alarm fires.
   void OnFecTimeout();
 
   // Called after sending |sequence_number| to determine whether an FEC alarm
   // should be set for sending out an FEC packet. Returns a positive and finite
   // timeout if an FEC alarm should be set, and infinite if no alarm should be
   // set. OnFecTimeout should be called to send the FEC packet when the alarm
   // fires.
   QuicTime::Delta GetFecTimeout(QuicPacketSequenceNumber sequence_number);
 
+  // Sets the encrypter to use for the encryption level.
+  void SetEncrypter(EncryptionLevel level, QuicEncrypter* encrypter);
+
   // Sets the encryption level that will be applied to new packets.
   void set_encryption_level(EncryptionLevel level);
 
   // Sequence number of the last created packet, or 0 if no packets have been
   // created.
   QuicPacketSequenceNumber sequence_number() const;
 
   QuicByteCount max_packet_length() const;
 
   void set_max_packet_length(QuicByteCount length);
@@ skipping 70 matching lines @@
 
   // Stores notifiers that should be attached to the next serialized packet.
   std::list<QuicAckNotifier*> ack_notifiers_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketGenerator);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_GENERATOR_H_