Mark QUIC broken when the network blackholes after the handshake

net/quic/chromium/quic_test_packet_maker.h

Index: net/quic/chromium/quic_test_packet_maker.h
diff --git a/net/quic/chromium/quic_test_packet_maker.h b/net/quic/chromium/quic_test_packet_maker.h
index 093eb11f69a0f1dc84862c401540ad22ae49e65f..e23e725e9155681d53a18763a5f22689f4d735e4 100644
--- a/net/quic/chromium/quic_test_packet_maker.h
+++ b/net/quic/chromium/quic_test_packet_maker.h
@@ -84,6 +84,13 @@ class QuicTestPacketMaker {
       QuicPacketNumber ack_least_unacked,
       QuicPacketNumber stop_least_unacked,
       bool send_feedback);
+  std::unique_ptr<QuicReceivedPacket> MakeAckPacket(
+      QuicPacketNumber packet_number,
+      QuicPacketNumber largest_received,
+      QuicPacketNumber ack_least_unacked,
+      QuicPacketNumber stop_least_unacked,
+      bool send_feedback,
+      QuicTime::Delta ack_delay_time);
   std::unique_ptr<QuicReceivedPacket> MakeDataPacket(
       QuicPacketNumber packet_number,
       QuicStreamId stream_id,