Use the default QUIC initial CWND.

net/quic/quic_stream_factory.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_stream_factory.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 243 matching lines @@
       http_server_properties_(http_server_properties),
       quic_crypto_client_stream_factory_(quic_crypto_client_stream_factory),
       random_generator_(random_generator),
       clock_(clock),
       max_packet_length_(max_packet_length),
       weak_factory_(this) {
   config_.SetDefaults();
   config_.set_idle_connection_state_lifetime(
       QuicTime::Delta::FromSeconds(30),
       QuicTime::Delta::FromSeconds(30));
+  config_.set_server_initial_congestion_window(kDefaultInitialWindow,
+                                               kDefaultInitialWindow);
+
   cannoncial_suffixes_.push_back(string(".c.youtube.com"));
   cannoncial_suffixes_.push_back(string(".googlevideo.com"));
 }
 
 QuicStreamFactory::~QuicStreamFactory() {
   CloseAllSessions(ERR_ABORTED);
   STLDeleteElements(&all_sessions_);
   STLDeleteValues(&active_jobs_);
   STLDeleteValues(&all_crypto_configs_);
 }
@@ skipping 286 matching lines @@
   // Copy the CachedState for the canonical server from canonical_crypto_config
   // as the initial CachedState for the server_hostname in crypto_config.
   crypto_config->InitializeFrom(server_hostname,
                                 canonical_host_port_proxy_pair.first.host(),
                                 canonical_crypto_config);
   // Update canonical version to point at the "most recent" crypto_config.
   canonical_hostname_to_origin_map_[canonical_host_port] = host_port_proxy_pair;
 }
 
 }  // namespace net