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_;

[ianswett, 2017/04/13 14:02:46]

This sort of mechanism could be useful for TFO and TLS 1.3(if there are
deployment issues with that), as well.

[Ryan Hamilton, 2017/04/13 17:26:56]

*nod* I don't think those systems use alternative services, but a retry-on-error
+ disable on success could definitely work!

+
   // The helper object to use to create WebSocketHandshakeStreamBase
   // objects. Only relevant when establishing a WebSocket connection.
   WebSocketHandshakeStreamBase::CreateHelper*