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

net/quic/core/quic_sent_packet_manager.cc

Index: net/quic/core/quic_sent_packet_manager.cc
diff --git a/net/quic/core/quic_sent_packet_manager.cc b/net/quic/core/quic_sent_packet_manager.cc
index 380448c62fddcf8f7421c277ebb56ce92baaf795..dd5aa54b2808bab7b4fe7907425a210ce6555acb 100644
--- a/net/quic/core/quic_sent_packet_manager.cc
+++ b/net/quic/core/quic_sent_packet_manager.cc
@@ -124,7 +124,11 @@ void QuicSentPacketManager::SetFromConfig(const QuicConfig& config) {
     }
   } else if (config.HasReceivedConnectionOptions() &&
              ContainsQuicTag(config.ReceivedConnectionOptions(), kBYTE)) {
-    SetSendAlgorithm(kCubicBytes);
+    if (FLAGS_quic_default_enable_cubic_bytes) {
+      SetSendAlgorithm(kCubic);
+    } else {
+      SetSendAlgorithm(kCubicBytes);
+    }
   }
   using_pacing_ = !FLAGS_quic_disable_pacing_for_perf_tests;