Revert of Remove support for Alt-Svc/Alternate Protocol Probability

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/atomic_sequence_num.h"
 #include "base/compiler_specific.h"
@@ skipping 80 matching lines @@
       enable_tcp_fast_open_for_ssl(false),
       enable_spdy_ping_based_connection_checking(true),
       spdy_default_protocol(kProtoUnknown),
       enable_spdy31(true),
       enable_http2(true),
       spdy_session_max_recv_window_size(kSpdySessionMaxRecvWindowSize),
       spdy_stream_max_recv_window_size(kSpdyStreamMaxRecvWindowSize),
       time_func(&base::TimeTicks::Now),
       parse_alternative_services(false),
       enable_alternative_service_with_different_host(false),
+      alternative_service_probability_threshold(1),
       enable_npn(true),
       enable_brotli(false),
       enable_quic(false),
       disable_quic_on_timeout_with_open_streams(false),
       enable_quic_for_proxies(false),
       enable_quic_port_selection(true),
       quic_always_require_handshake_confirmation(false),
       quic_disable_connection_pooling(false),
       quic_load_server_info_timeout_srtt_multiplier(0.25f),
       quic_enable_connection_racing(false),
@@ skipping 125 matching lines @@
 
   if (params_.enable_quic) {
     AlternateProtocol alternate =
         AlternateProtocolFromNextProto(kProtoQUIC1SPDY3);
     enabled_protocols_[alternate - ALTERNATE_PROTOCOL_MINIMUM_VALID_VERSION] =
         true;
   }
 
   next_protos_.push_back(kProtoHTTP11);
 
+  http_server_properties_->SetAlternativeServiceProbabilityThreshold(
+      params.alternative_service_probability_threshold);
   http_server_properties_->SetMaxServerConfigsStoredInProperties(
       params.quic_max_server_configs_stored_in_properties);
 }
 
 HttpNetworkSession::~HttpNetworkSession() {
   STLDeleteElements(&response_drainers_);
   spdy_session_pool_.CloseAllSessions();
 }
 
 void HttpNetworkSession::AddResponseDrainer(HttpResponseBodyDrainer* drainer) {
@@ skipping 55 matching lines @@
                    params_.enable_quic_port_selection);
   scoped_ptr<base::ListValue> connection_options(new base::ListValue);
   for (QuicTagVector::const_iterator it =
            params_.quic_connection_options.begin();
        it != params_.quic_connection_options.end(); ++it) {
     connection_options->AppendString("'" + QuicUtils::TagToString(*it) + "'");
   }
   dict->Set("connection_options", std::move(connection_options));
   dict->SetString("origin_to_force_quic_on",
                   params_.origin_to_force_quic_on.ToString());
+  dict->SetDouble("alternative_service_probability_threshold",
+                  params_.alternative_service_probability_threshold);
   dict->SetDouble("load_server_info_timeout_srtt_multiplier",
                   params_.quic_load_server_info_timeout_srtt_multiplier);
   dict->SetBoolean("enable_connection_racing",
                    params_.quic_enable_connection_racing);
   dict->SetBoolean("disable_disk_cache", params_.quic_disable_disk_cache);
   dict->SetBoolean("prefer_aes", params_.quic_prefer_aes);
   dict->SetInteger("max_number_of_lossy_connections",
                    params_.quic_max_number_of_lossy_connections);
   dict->SetDouble("packet_loss_threshold", params_.quic_packet_loss_threshold);
   dict->SetBoolean("delay_tcp_race", params_.quic_delay_tcp_race);
@@ skipping 51 matching lines @@
     case WEBSOCKET_SOCKET_POOL:
       return websocket_socket_pool_manager_.get();
     default:
       NOTREACHED();
       break;
   }
   return NULL;
 }
 
 }  // namespace net