QUIC - minor cleanup changes.

net/quic/quic_connection.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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 496 matching lines @@
 
   // Selects and updates the version of the protocol being used by selecting a
   // version from |available_versions| which is also supported. Returns true if
   // such a version exists, false otherwise.
   bool SelectMutualVersion(const QuicVersionVector& available_versions);
 
   QuicPacketWriter* writer() { return writer_; }
 
   bool peer_port_changed() const { return peer_port_changed_; }
 
-  const QuicReceivedPacketManager& received_packet_manager() {
+  const QuicReceivedPacketManager& received_packet_manager() const {
     return received_packet_manager_;
   }
 
   QuicPacketSequenceNumber sequence_number_of_last_sent_packet() const {
     return sequence_number_of_last_sent_packet_;
   }
 
  private:
   friend class test::QuicConnectionPeer;
 
@@ skipping 245 matching lines @@
   // If non-empty this contains the set of versions received in a
   // version negotiation packet.
   QuicVersionVector server_supported_versions_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_