In QUIC, do not enable forced HOL blocking if FLAGS_quic_reloadable_flag_quic_use_stream_notifier2 …

net/quic/core/quic_spdy_session.cc

 // Copyright (c) 2015 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_spdy_session.h"
 
 #include <algorithm>
 #include <cstdint>
 #include <string>
 #include <utility>
@@ skipping 610 matching lines @@
   connection()->CloseConnection(QUIC_INTERNAL_ERROR, error,
                                 ConnectionCloseBehavior::SILENT_CLOSE);
 }
 
 void QuicSpdySession::OnConfigNegotiated() {
   QuicSession::OnConfigNegotiated();
   if (config()->HasClientSentConnectionOption(kDHDT, perspective())) {
     DisableHpackDynamicTable();
   }
   const QuicVersion version = connection()->version();
-  if (FLAGS_quic_reloadable_flag_quic_enable_force_hol_blocking &&
+  if (!use_stream_notifier() &&
+      FLAGS_quic_reloadable_flag_quic_enable_force_hol_blocking &&
       version == QUIC_VERSION_36 && config()->ForceHolBlocking(perspective())) {
     force_hol_blocking_ = true;
     // Since all streams are tunneled through the headers stream, it
     // is important that headers stream never flow control blocks.
     // Otherwise, busy-loop behaviour can ensue where data streams
     // data try repeatedly to write data not realizing that the
     // tunnel through the headers stream is blocked.
     headers_stream_->flow_controller()->UpdateReceiveWindowSize(
         kStreamReceiveWindowLimit);
     headers_stream_->flow_controller()->UpdateSendWindowOffset(
@@ skipping 174 matching lines @@
     SpdyPriority priority) {
   auto* stream = static_cast<QuicSpdyStream*>(
       QuicSession::MaybeCreateOutgoingDynamicStream(priority));
   if (stream) {
     stream->SetPriority(priority);
   }
   return stream;
 }
 
 }  // namespace net