m58 merge QUIC: mark QUIC handshake failed if connection is closed after CryptoConnect

net/quic/chromium/quic_chromium_client_session.cc

Index: net/quic/chromium/quic_chromium_client_session.cc
diff --git a/net/quic/chromium/quic_chromium_client_session.cc b/net/quic/chromium/quic_chromium_client_session.cc
index 9d586835a06a7642bc602cc248e29754485ceb92..816094abb9f05153346c3e0de2a300700fd10428 100644
--- a/net/quic/chromium/quic_chromium_client_session.cc
+++ b/net/quic/chromium/quic_chromium_client_session.cc
@@ -670,6 +670,11 @@ int QuicChromiumClientSession::CryptoConnect(
   DCHECK(flow_controller());
   crypto_stream_->CryptoConnect();
 
+  // Check if the connection is still open, issues during CryptoConnect like
+  // packet write error could cause the connection to be torn down.
+  if (!connection()->connected())
+    return ERR_QUIC_HANDSHAKE_FAILED;
+
   if (IsCryptoHandshakeConfirmed()) {
     connect_timing_.connect_end = base::TimeTicks::Now();
     return OK;