Update from https://crrev.com/316786

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 14 matching lines @@
   server_stream_->OnServerHelloAcked();
 }
 
 QuicCryptoServerStream::QuicCryptoServerStream(
     const QuicCryptoServerConfig& crypto_config,
     QuicSession* session)
     : QuicCryptoStream(session),
       crypto_config_(crypto_config),
       validate_client_hello_cb_(nullptr),
       num_handshake_messages_(0),
-      num_server_config_update_messages_sent_(0) {}
+      num_server_config_update_messages_sent_(0) {
+  DCHECK(session->connection()->is_server());
+}
 
 QuicCryptoServerStream::~QuicCryptoServerStream() {
   CancelOutstandingCallbacks();
 }
 
 void QuicCryptoServerStream::CancelOutstandingCallbacks() {
   // Detach from the validation callback.  Calling this multiple times is safe.
   if (validate_client_hello_cb_ != nullptr) {
     validate_client_hello_cb_->Cancel();
   }
@@ skipping 204 matching lines @@
 
 void QuicCryptoServerStream::ValidateCallback::RunImpl(
     const CryptoHandshakeMessage& client_hello,
     const Result& result) {
   if (parent_ != nullptr) {
     parent_->FinishProcessingHandshakeMessage(client_hello, result);
   }
 }
 
 }  // namespace net