Rather than passing initial_flow_control_window all the way down the

net/quic/test_tools/quic_test_utils.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/test_tools/quic_test_utils.h"
 
 #include "base/sha1.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/quic/crypto/crypto_framer.h"
@@ skipping 283 matching lines @@
     const SerializedPacket& packet,
     TransmissionType transmission_type) {
   packets_.push_back(packet.packet);
   QuicEncryptedPacket* encrypted = QuicConnectionPeer::GetFramer(this)->
       EncryptPacket(level, packet.sequence_number, *packet.packet);
   encrypted_packets_.push_back(encrypted);
   return true;
 }
 
 MockSession::MockSession(QuicConnection* connection)
-    : QuicSession(connection, kInitialFlowControlWindowForTest,
-                  DefaultQuicConfig()) {
+    : QuicSession(connection, DefaultQuicConfig()) {
   ON_CALL(*this, WritevData(_, _, _, _, _, _))
       .WillByDefault(testing::Return(QuicConsumedData(0, false)));
 }
 
 MockSession::~MockSession() {
 }
 
 TestSession::TestSession(QuicConnection* connection, const QuicConfig& config)
-    : QuicSession(connection, kInitialFlowControlWindowForTest, config),
+    : QuicSession(connection, config),
       crypto_stream_(NULL) {}
 
 TestSession::~TestSession() {}
 
 void TestSession::SetCryptoStream(QuicCryptoStream* stream) {
   crypto_stream_ = stream;
 }
 
 QuicCryptoStream* TestSession::GetCryptoStream() {
   return crypto_stream_;
 }
 
 TestClientSession::TestClientSession(QuicConnection* connection,
                                      const QuicConfig& config)
-    : QuicClientSessionBase(connection, kInitialFlowControlWindowForTest,
+    : QuicClientSessionBase(connection,
                             config),
       crypto_stream_(NULL) {
     EXPECT_CALL(*this, OnProofValid(_)).Times(AnyNumber());
 }
 
 TestClientSession::~TestClientSession() {}
 
 void TestClientSession::SetCryptoStream(QuicCryptoStream* stream) {
   crypto_stream_ = stream;
 }
@@ skipping 240 matching lines @@
   return 1u;
 }
 
 MockEntropyCalculator::MockEntropyCalculator() {}
 
 MockEntropyCalculator::~MockEntropyCalculator() {}
 
 QuicConfig DefaultQuicConfig() {
   QuicConfig config;
   config.SetDefaults();
+  config.SetInitialFlowControlWindowToSend(kInitialFlowControlWindowForTest);
   return config;
 }
 
 QuicVersionVector SupportedVersions(QuicVersion version) {
   QuicVersionVector versions;
   versions.push_back(version);
   return versions;
 }
 
 }  // namespace test
 }  // namespace net