Mark QUIC broken when the network blackholes after the handshake

components/network_session_configurator/network_session_configurator.cc

 // Copyright 2016 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 "components/network_session_configurator/network_session_configurator.h"
 
 #include <map>
 #include <unordered_set>
 
 #include "base/metrics/field_trial.h"
@@ skipping 89 matching lines @@
   if (is_quic_force_enabled)
     return true;
 
   return quic_trial_group.starts_with(kQuicFieldTrialEnabledGroupName) ||
          quic_trial_group.starts_with(kQuicFieldTrialHttpsEnabledGroupName) ||
          base::LowerCaseEqualsASCII(
              GetVariationParam(quic_trial_params, "enable_quic"),
              "true");
 }
 
+bool ShouldMarkQuicBrokenWhenNetworkBlackholes(
+    const VariationParameters& quic_trial_params) {
+  return base::LowerCaseEqualsASCII(
+      GetVariationParam(quic_trial_params,
+                        "mark_quic_broken_when_network_blackholes"),
+      "true");
+}
+
 bool ShouldQuicDisableConnectionPooling(
     const VariationParameters& quic_trial_params) {
   return base::LowerCaseEqualsASCII(
       GetVariationParam(quic_trial_params, "disable_connection_pooling"),
       "true");
 }
 
 bool ShouldQuicEnableAlternativeServicesForDifferentHost(
     const VariationParameters& quic_trial_params) {
   return !base::LowerCaseEqualsASCII(
@@ skipping 198 matching lines @@
 
 void ConfigureQuicParams(base::StringPiece quic_trial_group,
                          const VariationParameters& quic_trial_params,
                          bool is_quic_force_disabled,
                          bool is_quic_force_enabled,
                          const std::string& quic_user_agent_id,
                          net::HttpNetworkSession::Params* params) {
   params->enable_quic = ShouldEnableQuic(
       quic_trial_group, quic_trial_params, is_quic_force_disabled,
       is_quic_force_enabled);
+  params->mark_quic_broken_when_network_blackholes =
+      ShouldMarkQuicBrokenWhenNetworkBlackholes(quic_trial_params);
 
   params->enable_quic_alternative_service_with_different_host =
       ShouldQuicEnableAlternativeServicesForDifferentHost(quic_trial_params);
 
   if (params->enable_quic) {
     params->quic_always_require_handshake_confirmation =
         ShouldQuicAlwaysRequireHandshakeConfirmation(quic_trial_params);
     params->quic_disable_connection_pooling =
         ShouldQuicDisableConnectionPooling(quic_trial_params);
     int receive_buffer_size = GetQuicSocketReceiveBufferSize(quic_trial_params);
@@ skipping 121 matching lines @@
   ConfigureTCPFastOpenParams(tfo_trial_group, params);
 
   std::map<std::string, std::string> proxy_preconnects_trial_params;
   variations::GetVariationParams("NetProxyPreconnects",
                                  &proxy_preconnects_trial_params);
   ConfigureOptimizePreconnectsToProxiesParams(proxy_preconnects_trial_params,
                                               params);
 }
 
 }  // namespace network_session_configurator