Update from https://crrev.com/312398

net/quic/quic_crypto_client_stream.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_crypto_client_stream.h"
 
 #include "base/metrics/histogram.h"
 #include "base/profiler/scoped_tracker.h"
 #include "net/quic/crypto/crypto_protocol.h"
 #include "net/quic/crypto/crypto_utils.h"
@@ skipping 421 matching lines @@
 
 void QuicCryptoClientStream::DoVerifyProofComplete(
     QuicCryptoClientConfig::CachedState* cached) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/422516 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "422516 QuicCryptoClientStream::DoVerifyProofComplete"));
 
   if (!verify_ok_) {
     next_state_ = STATE_NONE;
-    client_session()->OnProofVerifyDetailsAvailable(*verify_details_);
+    if (verify_details_) {
+      client_session()->OnProofVerifyDetailsAvailable(*verify_details_);
+    }
     UMA_HISTOGRAM_BOOLEAN("Net.QuicVerifyProofFailed.HandshakeConfirmed",
                           handshake_confirmed());
     CloseConnectionWithDetails(
         QUIC_PROOF_INVALID, "Proof invalid: " + verify_error_details_);
     return;
   }
 
   // Check if generation_counter has changed between STATE_VERIFY_PROOF and
   // STATE_VERIFY_PROOF_COMPLETE state changes.
   if (generation_counter_ != cached->generation_counter()) {
@@ skipping 192 matching lines @@
     }
   }
   return false;
 }
 
 QuicClientSessionBase* QuicCryptoClientStream::client_session() {
   return reinterpret_cast<QuicClientSessionBase*>(session());
 }
 
 }  // namespace net