Change how QUIC negotiates pacing from congestion feedback to QUIC

net/quic/quic_config.cc

 // Copyright (c) 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/quic_config.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "net/quic/crypto/crypto_handshake_message.h"
@@ skipping 628 matching lines @@
   // of them in negotiated, ToHandshakeMessage, ProcessClientHello, and
   // ProcessServerHello.
   return congestion_feedback_.negotiated() &&
       idle_connection_state_lifetime_seconds_.negotiated() &&
       keepalive_timeout_seconds_.negotiated() &&
       max_streams_per_connection_.negotiated();
 }
 
 void QuicConfig::SetDefaults() {
   QuicTagVector congestion_feedback;
-  if (FLAGS_enable_quic_pacing) {
-    congestion_feedback.push_back(kPACE);
-  }
   congestion_feedback.push_back(kQBIC);
   congestion_feedback_.set(congestion_feedback, kQBIC);
   idle_connection_state_lifetime_seconds_.set(kDefaultTimeoutSecs,
                                               kDefaultInitialTimeoutSecs);
   // kKATO is optional. Return 0 if not negotiated.
   keepalive_timeout_seconds_.set(0, 0);
   max_streams_per_connection_.set(kDefaultMaxStreamsPerConnection,
                                   kDefaultMaxStreamsPerConnection);
   max_time_before_crypto_handshake_ = QuicTime::Delta::FromSeconds(
       kDefaultMaxTimeForCryptoHandshakeSecs);
 
   SetInitialFlowControlWindowToSend(kDefaultFlowControlSendWindow);
   SetInitialStreamFlowControlWindowToSend(kDefaultFlowControlSendWindow);
   SetInitialSessionFlowControlWindowToSend(kDefaultFlowControlSendWindow);
 }
 
-void QuicConfig::EnablePacing(bool enable_pacing) {
-  QuicTagVector congestion_feedback;
-  if (enable_pacing) {
-    congestion_feedback.push_back(kPACE);
-  }
-  congestion_feedback.push_back(kQBIC);
-  congestion_feedback_.set(congestion_feedback, kQBIC);
-}
-
 void QuicConfig::ToHandshakeMessage(CryptoHandshakeMessage* out) const {
   congestion_feedback_.ToHandshakeMessage(out);
   idle_connection_state_lifetime_seconds_.ToHandshakeMessage(out);
   keepalive_timeout_seconds_.ToHandshakeMessage(out);
   max_streams_per_connection_.ToHandshakeMessage(out);
   initial_congestion_window_.ToHandshakeMessage(out);
   initial_round_trip_time_us_.ToHandshakeMessage(out);
   loss_detection_.ToHandshakeMessage(out);
   initial_flow_control_window_bytes_.ToHandshakeMessage(out);
   initial_stream_flow_control_window_bytes_.ToHandshakeMessage(out);
@@ skipping 54 matching lines @@
         peer_hello, hello_type, error_details);
   }
   if (error == QUIC_NO_ERROR) {
     error = connection_options_.ProcessPeerHello(
         peer_hello, hello_type, error_details);
   }
   return error;
 }
 
 }  // namespace net