Change how QUIC negotiates pacing from congestion feedback to QUIC

net/quic/quic_config.cc

Index: net/quic/quic_config.cc
diff --git a/net/quic/quic_config.cc b/net/quic/quic_config.cc
index c68eac980be60f6d28635f3356fbe44d7a830613..4542a04f7477d2e84360a6a6422b84bfcc8d860a 100644
--- a/net/quic/quic_config.cc
+++ b/net/quic/quic_config.cc
@@ -646,9 +646,6 @@ bool QuicConfig::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,
@@ -665,15 +662,6 @@ void QuicConfig::SetDefaults() {
   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);