Default enable QUIC's Cubic in bytes congestion control implementation. Protected by ENABLED FLAGS…

net/quic/core/quic_connection.cc

Index: net/quic/core/quic_connection.cc
diff --git a/net/quic/core/quic_connection.cc b/net/quic/core/quic_connection.cc
index 6fe21cf33f6a76093dfe9f94f58e0e909d943b1f..41ca54bcb3b7b6e59bf7236833e7913947035cbb 100644
--- a/net/quic/core/quic_connection.cc
+++ b/net/quic/core/quic_connection.cc
@@ -265,13 +265,14 @@ QuicConnection::QuicConnection(QuicConnectionId connection_id,
       time_of_last_sent_new_packet_(clock_->ApproximateNow()),
       last_send_for_timeout_(clock_->ApproximateNow()),
       packet_number_of_last_sent_packet_(0),
-      sent_packet_manager_(new QuicSentPacketManager(perspective,
-                                                     kDefaultPathId,
-                                                     clock_,
-                                                     &stats_,
-                                                     kCubic,
-                                                     kNack,
-                                                     /*delegate=*/nullptr)),
+      sent_packet_manager_(new QuicSentPacketManager(
+          perspective,
+          kDefaultPathId,
+          clock_,
+          &stats_,
+          FLAGS_quic_default_enable_cubic_bytes ? kCubicBytes : kCubic,
+          kNack,
+          /*delegate=*/nullptr)),
       version_negotiation_state_(START_NEGOTIATION),
       perspective_(perspective),
       connected_(true),