Ensure that BBR does not drop to exceedingly low pacing rates during the STARTUP phase. Protected …

net/quic/core/congestion_control/bbr_sender.h

Index: net/quic/core/congestion_control/bbr_sender.h
diff --git a/net/quic/core/congestion_control/bbr_sender.h b/net/quic/core/congestion_control/bbr_sender.h
index 952568dd4ce8f92defd3fdd2ea976aef1f0382ae..0838c54cc6d5da840682499debbb67b32530bd33 100644
--- a/net/quic/core/congestion_control/bbr_sender.h
+++ b/net/quic/core/congestion_control/bbr_sender.h
@@ -270,6 +270,10 @@ class NET_EXPORT_PRIVATE BbrSender : public SendAlgorithmInterface {
   // A window used to limit the number of bytes in flight during loss recovery.
   QuicByteCount recovery_window_;
 
+  // Indicates whether to always only increase the pacing rate during startup.
+  // Latches |FLAGS_quic_bbr_faster_startup|.
+  bool enforce_startup_pacing_rate_increase_;
+
   DISALLOW_COPY_AND_ASSIGN(BbrSender);
 };