Deprecate FLAGS_quic_buffer_packet_till_chlo.

net/quic/core/quic_server_session_base_test.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/core/quic_server_session_base.h"
 
 #include <cstdint>
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 587 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(StreamMemberLifetimeTests,
                         StreamMemberLifetimeTest,
                         ::testing::ValuesIn(AllSupportedVersions()));
 
 // Trigger an operation which causes an async invocation of
 // ProofSource::GetProof.  Delay the completion of the operation until after the
 // stream has been destroyed, and verify that there are no memory bugs.
 TEST_P(StreamMemberLifetimeTest, Basic) {
   FLAGS_enable_async_get_proof = true;
-  FLAGS_quic_buffer_packet_till_chlo = true;
   FLAGS_enable_quic_stateless_reject_support = true;
   FLAGS_quic_use_cheap_stateless_rejects = true;
   FLAGS_quic_create_session_after_insertion = true;
 
   const QuicClock* clock = helper_.GetClock();
   QuicVersion version = AllSupportedVersions().front();
   CryptoHandshakeMessage chlo = CryptoTestUtils::GenerateDefaultInchoateCHLO(
       clock, version, &crypto_config_);
   chlo.SetVector(kCOPT, QuicTagVector{kSREJ});
   std::vector<QuicVersion> packet_version_list = {version};
@@ skipping 27 matching lines @@
 
   // Allow the async ProofSource::GetProof call to complete.  Verify (under
   // asan) that this does not result in accesses to any freed memory from the
   // session or its subobjects.
   GetFakeProofSource()->InvokePendingCallback(0);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net