Refactoring: Create per-connection packet writers in QuicDispatcher.

net/quic/quic_connection.cc

 // 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.
 
 #include "net/quic/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 #include <algorithm>
 #include <iterator>
@@ skipping 172 matching lines @@
       NOT_HANDSHAKE : packet.retransmittable_frames->HasCryptoHandshake()),
     type(GetPacketType(packet.retransmittable_frames)),
     length(packet.packet->length()) {
 }
 
 #define ENDPOINT (is_server_ ? "Server: " : " Client: ")
 
 QuicConnection::QuicConnection(QuicConnectionId connection_id,
                                IPEndPoint address,
                                QuicConnectionHelperInterface* helper,
-                               QuicPacketWriter* writer,
+                               const PacketWriterFactory& writer_factory,
                                bool owns_writer,
                                bool is_server,
                                const QuicVersionVector& supported_versions)
     : framer_(supported_versions, helper->GetClock()->ApproximateNow(),
               is_server),
       helper_(helper),
-      writer_(writer),
+      writer_(writer_factory.Create(this)),
       owns_writer_(owns_writer),
       encryption_level_(ENCRYPTION_NONE),
       clock_(helper->GetClock()),
       random_generator_(helper->GetRandomGenerator()),
       connection_id_(connection_id),
       peer_address_(address),
       migrating_peer_port_(0),
       last_packet_revived_(false),
       last_size_(0),
       last_decrypted_packet_level_(ENCRYPTION_NONE),
@@ skipping 1777 matching lines @@
   // If we changed the generator's batch state, restore original batch state.
   if (!already_in_batch_mode_) {
     DVLOG(1) << "Leaving Batch Mode.";
     connection_->packet_generator_.FinishBatchOperations();
   }
   DCHECK_EQ(already_in_batch_mode_,
             connection_->packet_generator_.InBatchMode());
 }
 
 }  // namespace net