Update from https://crrev.com/303153

net/quic/crypto/quic_crypto_server_config.cc

 // Copyright 2013 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/crypto/quic_crypto_server_config.h"
 
 #include <stdlib.h>
 #include <algorithm>
 
 #include "base/stl_util.h"
@@ skipping 1402 matching lines @@
   source_address_token.set_ip(IPAddressToPackedString(ip_address));
   source_address_token.set_timestamp(now.ToUNIXSeconds());
   if (cached_network_params != nullptr) {
     source_address_token.set_cached_network_parameters(*cached_network_params);
   }
 
   return config.source_address_token_boxer->Box(
       rand, source_address_token.SerializeAsString());
 }
 
+bool QuicCryptoServerConfig::HasProofSource() const {
+  return proof_source_ != nullptr;
+}
+
 HandshakeFailureReason QuicCryptoServerConfig::ValidateSourceAddressToken(
     const Config& config,
     StringPiece token,
     const IPEndPoint& ip,
     QuicWallTime now,
     CachedNetworkParameters* cached_network_params) const {
   string storage;
   StringPiece plaintext;
   if (!config.source_address_token_boxer->Unbox(token, &storage, &plaintext)) {
     return SOURCE_ADDRESS_TOKEN_DECRYPTION_FAILURE;
@@ skipping 121 matching lines @@
 QuicCryptoServerConfig::Config::Config()
     : channel_id_enabled(false),
       is_primary(false),
       primary_time(QuicWallTime::Zero()),
       priority(0),
       source_address_token_boxer(nullptr) {}
 
 QuicCryptoServerConfig::Config::~Config() { STLDeleteElements(&key_exchanges); }
 
 }  // namespace net