Rather than passing initial_flow_control_window all the way down the

net/quic/crypto/quic_crypto_server_config.h

 // 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.
 
 #ifndef NET_QUIC_CRYPTO_QUIC_CRYPTO_SERVER_CONFIG_H_
 #define NET_QUIC_CRYPTO_QUIC_CRYPTO_SERVER_CONFIG_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 186 matching lines @@
   //     nonce when we send a rejection. After a successful handshake, this will
   //     contain the state of the connection.
   // out: the resulting handshake message (either REJ or SHLO)
   // error_details: used to store a string describing any error.
   QuicErrorCode ProcessClientHello(
       const ValidateClientHelloResultCallback::Result& validate_chlo_result,
       QuicConnectionId connection_id,
       IPEndPoint client_address,
       QuicVersion version,
       const QuicVersionVector& supported_versions,
-      uint32 initial_flow_control_window_bytes,
       const QuicClock* clock,
       QuicRandom* rand,
       QuicCryptoNegotiatedParameters* params,
       CryptoHandshakeMessage* out,
       std::string* error_details) const;
 
   // SetProofSource installs |proof_source| as the ProofSource for handshakes.
   // This object takes ownership of |proof_source|.
   void SetProofSource(ProofSource* proof_source);
 
@@ skipping 251 matching lines @@
   uint32 source_address_token_lifetime_secs_;
   uint32 server_nonce_strike_register_max_entries_;
   uint32 server_nonce_strike_register_window_secs_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicCryptoServerConfig);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_QUIC_CRYPTO_SERVER_CONFIG_H_