Update from https://crrev.com/307330

net/quic/quic_sent_packet_manager.cc

Index: net/quic/quic_sent_packet_manager.cc
diff --git a/net/quic/quic_sent_packet_manager.cc b/net/quic/quic_sent_packet_manager.cc
index 56c327cb6150e9bd56385cece38a307fc2183dab..9f3f3d306dad089274ed75183f38edf7784dffb4 100644
--- a/net/quic/quic_sent_packet_manager.cc
+++ b/net/quic/quic_sent_packet_manager.cc
@@ -134,8 +134,8 @@ void QuicSentPacketManager::SetFromConfig(const QuicConfig& config) {
         clock_, &rtt_stats_, kReno, stats_, initial_congestion_window_));
   }
   if (HasClientSentConnectionOption(config, kPACE) ||
-      (FLAGS_quic_allow_bbr &&
-       HasClientSentConnectionOption(config, kTBBR))) {
+      FLAGS_quic_enable_pacing ||
+      (FLAGS_quic_allow_bbr && HasClientSentConnectionOption(config, kTBBR))) {
     EnablePacing();
   }
   if (HasClientSentConnectionOption(config, k1CON)) {