Clear cached QUIC network stats when a QUIC handshake fails.

net/quic/chromium/quic_stream_factory.cc

Index: net/quic/chromium/quic_stream_factory.cc
diff --git a/net/quic/chromium/quic_stream_factory.cc b/net/quic/chromium/quic_stream_factory.cc
index 6e63b9be0094e4afb3d28ec36b8d335f6c21bab5..d546a7da03024f096baae084b0b8175032426754 100644
--- a/net/quic/chromium/quic_stream_factory.cc
+++ b/net/quic/chromium/quic_stream_factory.cc
@@ -1947,17 +1947,19 @@ void QuicStreamFactory::ProcessGoingAwaySession(
   const QuicConnectionStats& stats = session->connection()->GetStats();
   const AlternativeService alternative_service(kProtoQUIC,
                                                server_id.host_port_pair());
+  url::SchemeHostPort server("https", server_id.host_port_pair().host(),
+                             server_id.host_port_pair().port());
   if (session->IsCryptoHandshakeConfirmed()) {
     http_server_properties_->ConfirmAlternativeService(alternative_service);
     ServerNetworkStats network_stats;
     network_stats.srtt = base::TimeDelta::FromMicroseconds(stats.srtt_us);
     network_stats.bandwidth_estimate = stats.estimated_bandwidth;
-    url::SchemeHostPort server("https", server_id.host_port_pair().host(),
-                               server_id.host_port_pair().port());
     http_server_properties_->SetServerNetworkStats(server, network_stats);
     return;
   }
 
+  http_server_properties_->ClearServerNetworkStats(server);
+
   UMA_HISTOGRAM_COUNTS("Net.QuicHandshakeNotConfirmedNumPacketsReceived",
                        stats.packets_received);