Mark QUIC broken when the network blackholes after the handshake

components/network_session_configurator/network_session_configurator.cc

Index: components/network_session_configurator/network_session_configurator.cc
diff --git a/components/network_session_configurator/network_session_configurator.cc b/components/network_session_configurator/network_session_configurator.cc
index b26ee591873095870a0612c0692770c6f8313152..c53ba0784e6ab0a0272324f1ff448ee0113df5d3 100644
--- a/components/network_session_configurator/network_session_configurator.cc
+++ b/components/network_session_configurator/network_session_configurator.cc
@@ -107,6 +107,14 @@ bool ShouldEnableQuic(base::StringPiece quic_trial_group,
              "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(
@@ -325,6 +333,8 @@ void ConfigureQuicParams(base::StringPiece quic_trial_group,
   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);