HttpServerProperties - Don't persist if ConfirmAlternativeService is

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 1a1ab79c48648509c3619fdd757476d62cb5a86c..d4faf0ee8a649597a95209ff0345c7d676a928cd 100644
--- a/net/http/http_server_properties_manager.cc
+++ b/net/http/http_server_properties_manager.cc
@@ -245,8 +245,15 @@ bool HttpServerPropertiesManager::WasAlternativeServiceRecentlyBroken(
 void HttpServerPropertiesManager::ConfirmAlternativeService(
     const AlternativeService& alternative_service) {
   DCHECK(network_task_runner_->RunsTasksOnCurrentThread());
+  bool old_value = http_server_properties_impl_->IsAlternativeServiceBroken(
+      alternative_service);
   http_server_properties_impl_->ConfirmAlternativeService(alternative_service);
-  ScheduleUpdatePrefsOnNetworkThread(CONFIRM_ALTERNATIVE_SERVICE);
+  bool new_value = http_server_properties_impl_->IsAlternativeServiceBroken(
+      alternative_service);
+  // For persisting, we only care about the value returned by
+  // IsAlternativeServiceBroken. If that value changes, then call persist.
+  if (old_value != new_value)
+    ScheduleUpdatePrefsOnNetworkThread(CONFIRM_ALTERNATIVE_SERVICE);
 }
 
 void HttpServerPropertiesManager::ClearAlternativeService(