Revert of Enable QUIC 17.

net/http/http_network_session.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/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/debug/stack_trace.h"
@@ skipping 73 matching lines @@
       enable_quic_https(false),
       enable_quic_port_selection(true),
       enable_quic_pacing(false),
       enable_quic_time_based_loss_detection(false),
       enable_quic_persist_server_info(false),
       quic_clock(NULL),
       quic_random(NULL),
       quic_max_packet_length(kDefaultMaxPacketSize),
       enable_user_alternate_protocol_ports(false),
       quic_crypto_client_stream_factory(NULL) {
-  quic_supported_versions.push_back(QUIC_VERSION_17);
+  quic_supported_versions.push_back(QUIC_VERSION_16);
 }
 
 HttpNetworkSession::Params::~Params() {}
 
 // TODO(mbelshe): Move the socket factories into HttpStreamFactory.
 HttpNetworkSession::HttpNetworkSession(const Params& params)
     : net_log_(params.net_log),
       network_delegate_(params.network_delegate),
       http_server_properties_(params.http_server_properties),
       cert_verifier_(params.cert_verifier),
@@ skipping 140 matching lines @@
     case WEBSOCKET_SOCKET_POOL:
       return websocket_socket_pool_manager_.get();
     default:
       NOTREACHED();
       break;
   }
   return NULL;
 }
 
 }  //  namespace net