Deprecate --quic_sslr_limit_reduction.

net/quic/congestion_control/tcp_cubic_sender_bytes.cc

Index: net/quic/congestion_control/tcp_cubic_sender_bytes.cc
diff --git a/net/quic/congestion_control/tcp_cubic_sender_bytes.cc b/net/quic/congestion_control/tcp_cubic_sender_bytes.cc
index 012bf043e11a2c1629531ad0de1acceda5c1aadb..60ba0a3212c341f145b2e40857517fb358f828ef 100644
--- a/net/quic/congestion_control/tcp_cubic_sender_bytes.cc
+++ b/net/quic/congestion_control/tcp_cubic_sender_bytes.cc
@@ -123,8 +123,7 @@ void TcpCubicSenderBytes::OnPacketLost(QuicPacketNumber packet_number,
   // TODO(jri): Separate out all of slow start into a separate class.
   if (slow_start_large_reduction_ && InSlowStart()) {
     DCHECK_LT(kDefaultTCPMSS, congestion_window_);
-    if (FLAGS_quic_sslr_limit_reduction &&
-        congestion_window_ >= 2 * initial_tcp_congestion_window_) {
+    if (congestion_window_ >= 2 * initial_tcp_congestion_window_) {
       min_slow_start_exit_window_ = congestion_window_ / 2;
     }
     congestion_window_ = congestion_window_ - kDefaultTCPMSS;