When HttpNetworkTransaction encounters QUIC errors, retry the request

net/http/http_network_transaction.h

Index: net/http/http_network_transaction.h
diff --git a/net/http/http_network_transaction.h b/net/http/http_network_transaction.h
index 550b24bc2d9fd29669225efca4208edd269c9ca8..6aa35e4d6e50e560703f477b6bcb300c67c5e69f 100644
--- a/net/http/http_network_transaction.h
+++ b/net/http/http_network_transaction.h
@@ -380,6 +380,10 @@ class NET_EXPORT_PRIVATE HttpNetworkTransaction
   // Enable using alternative services for the request.
   bool enable_alternative_services_;
 
+  // When a request is retried because of errors with the alternative service,
+  // this will store the alternative service used.
+  AlternativeService retried_alternative_service_;
+
   // The helper object to use to create WebSocketHandshakeStreamBase
   // objects. Only relevant when establishing a WebSocket connection.
   WebSocketHandshakeStreamBase::CreateHelper*