Change the defaults QuicConfig::server_initial_congestion_window to be

net/tools/quic/quic_server.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/tools/quic/quic_server.h"
 
 #include <errno.h>
 #include <features.h>
 #include <netinet/in.h>
 #include <string.h>
@@ skipping 26 matching lines @@
     : port_(0),
       fd_(-1),
       packets_dropped_(0),
       overflow_supported_(false),
       use_recvmmsg_(false),
       crypto_config_(kSourceAddressTokenSecret, QuicRandom::GetInstance()),
       supported_versions_(QuicSupportedVersions()) {
   // Use hardcoded crypto parameters for now.
   config_.SetDefaults();
   config_.set_initial_round_trip_time_us(kMaxInitialRoundTripTimeUs, 0);
+  config_.set_server_initial_congestion_window(kMaxInitialWindow,
+                                               kDefaultInitialWindow);
   Initialize();
 }
 
 QuicServer::QuicServer(const QuicConfig& config,
                        const QuicVersionVector& supported_versions)
     : port_(0),
       fd_(-1),
       packets_dropped_(0),
       overflow_supported_(false),
       use_recvmmsg_(false),
@@ skipping 169 matching lines @@
   QuicEncryptedPacket packet(buf, bytes_read, false);
 
   IPEndPoint server_address(server_ip, port);
   MaybeDispatchPacket(dispatcher, packet, server_address, client_address);
 
   return true;
 }
 
 }  // namespace tools
 }  // namespace net