Clear cached QUIC network stats when a QUIC handshake fails.

net/quic/chromium/quic_network_transaction_unittest.cc

Index: net/quic/chromium/quic_network_transaction_unittest.cc
diff --git a/net/quic/chromium/quic_network_transaction_unittest.cc b/net/quic/chromium/quic_network_transaction_unittest.cc
index 611247e2a990e9fb6e2e00a3c03bc7a714181373..27261cc96befce5421d0223aac5c44523d319b9e 100644
--- a/net/quic/chromium/quic_network_transaction_unittest.cc
+++ b/net/quic/chromium/quic_network_transaction_unittest.cc
@@ -1832,6 +1832,9 @@ TEST_P(QuicNetworkTransactionTest, ConfirmAlternativeService) {
 
   EXPECT_FALSE(http_server_properties_.WasAlternativeServiceRecentlyBroken(
       alternative_service));
+  EXPECT_NE(nullptr,
+            http_server_properties_.GetServerNetworkStats(
+                url::SchemeHostPort("https", request_.url.host(), 443)));
 }
 
 TEST_P(QuicNetworkTransactionTest, UseAlternativeServiceForQuicForHttps) {
@@ -1999,6 +2002,10 @@ TEST_P(QuicNetworkTransactionTest, ZeroRTTWithHttpRace) {
   CreateSession();
   AddQuicAlternateProtocolMapping(MockCryptoClientStream::ZERO_RTT);
   SendRequestAndExpectQuicResponse("hello!");
+
+  EXPECT_EQ(nullptr,
+            http_server_properties_.GetServerNetworkStats(
+                url::SchemeHostPort("https", request_.url.host(), 443)));
 }
 
 TEST_P(QuicNetworkTransactionTest, ZeroRTTWithNoHttpRace) {