Remove support for Alt-Svc/Alternate Protocol Probability

net/http/http_server_properties_manager.cc

Index: net/http/http_server_properties_manager.cc
diff --git a/net/http/http_server_properties_manager.cc b/net/http/http_server_properties_manager.cc
index f8d133c91b0bd3fda6dd03c1c4392e1f7eb08c4a..a592f441bb09eb71cb7371d421b33e5fb63f5600 100644
--- a/net/http/http_server_properties_manager.cc
+++ b/net/http/http_server_properties_manager.cc
@@ -61,7 +61,6 @@ const char kAlternativeServiceKey[] = "alternative_service";
 const char kProtocolKey[] = "protocol_str";
 const char kHostKey[] = "host";
 const char kPortKey[] = "port";
-const char kProbabilityKey[] = "probability";
 const char kExpirationKey[] = "expiration";
 const char kNetworkStatsKey[] = "network_stats";
 const char kSrttKey[] = "srtt";
@@ -195,11 +194,10 @@ AlternativeServiceVector HttpServerPropertiesManager::GetAlternativeServices(
 bool HttpServerPropertiesManager::SetAlternativeService(
     const HostPortPair& origin,
     const AlternativeService& alternative_service,
-    double alternative_probability,
     base::Time expiration) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
   const bool changed = http_server_properties_impl_->SetAlternativeService(
-      origin, alternative_service, alternative_probability, expiration);
+      origin, alternative_service, expiration);
   if (changed) {
     ScheduleUpdatePrefsOnNetworkThread(SET_ALTERNATIVE_SERVICES);
   }
@@ -288,13 +286,6 @@ HttpServerPropertiesManager::GetAlternativeServiceInfoAsValue()
   return http_server_properties_impl_->GetAlternativeServiceInfoAsValue();
 }
 
-void HttpServerPropertiesManager::SetAlternativeServiceProbabilityThreshold(
-    double threshold) {
-  DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
-  http_server_properties_impl_->SetAlternativeServiceProbabilityThreshold(
-      threshold);
-}
-
 const SettingsMap& HttpServerPropertiesManager::GetSpdySettings(
     const HostPortPair& host_port_pair) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
@@ -662,16 +653,6 @@ bool HttpServerPropertiesManager::ParseAlternativeServiceDict(
   alternative_service_info->alternative_service.port =
       static_cast<uint32_t>(port);
 
-  // Probability is optional, defaults to 1.0.
-  alternative_service_info->probability = 1.0;
-  if (alternative_service_dict.HasKey(kProbabilityKey) &&
-      !alternative_service_dict.GetDoubleWithoutPathExpansion(
-          kProbabilityKey, &(alternative_service_info->probability))) {
-    DVLOG(1) << "Malformed alternative service probability for server: "
-             << server_str;
-    return false;
-  }
-
   // Expiration is optional, defaults to one day.
   base::Time expiration;
   if (!alternative_service_dict.HasKey(kExpirationKey)) {
@@ -1196,8 +1177,6 @@ void HttpServerPropertiesManager::SaveAlternativeServiceToServerPrefs(
     }
     alternative_service_dict->SetString(
         kProtocolKey, AlternateProtocolToString(alternative_service.protocol));
-    alternative_service_dict->SetDouble(kProbabilityKey,
-                                        alternative_service_info.probability);
     // JSON cannot store int64_t, so expiration is converted to a string.
     alternative_service_dict->SetString(
         kExpirationKey,