Update from https://crrev.com/305340

net/quic/quic_crypto_server_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_server_stream.h"
 
 #include "base/base64.h"
 #include "crypto/secure_hash.h"
 #include "net/quic/crypto/cached_network_parameters.h"
 #include "net/quic/crypto/crypto_protocol.h"
@@ skipping 227 matching lines @@
       session()->connection()->version(),
       session()->connection()->supported_versions(),
       session()->connection()->clock(),
       session()->connection()->random_generator(),
       &crypto_negotiated_params_, reply, error_details);
 }
 
 void QuicCryptoServerStream::OverrideQuicConfigDefaults(QuicConfig* config) {
 }
 
-CachedNetworkParameters*
-QuicCryptoServerStream::get_previous_cached_network_params() {
+const CachedNetworkParameters*
+QuicCryptoServerStream::previous_cached_network_params() const {
   return previous_cached_network_params_.get();
 }
 
 QuicCryptoServerStream::ValidateCallback::ValidateCallback(
     QuicCryptoServerStream* parent) : parent_(parent) {
 }
 
 void QuicCryptoServerStream::ValidateCallback::Cancel() { parent_ = nullptr; }
 
 void QuicCryptoServerStream::ValidateCallback::RunImpl(
     const CryptoHandshakeMessage& client_hello,
     const Result& result) {
   if (parent_ != nullptr) {
     parent_->FinishProcessingHandshakeMessage(client_hello, result);
   }
 }
 
 }  // namespace net