gfe-relnote: In QUIC, adjust cwnd when doing bandwidth resumption in BBR. Protected by gfe2_reloadable_flag_quic_fix_bbr_cwnd_in_bandwidth_resumption.

PiperOrigin-RevId: 245482154
Change-Id: I0bfa7b414dc369925ab55438894b1579f91d0459
diff --git a/quic/core/quic_constants.h b/quic/core/quic_constants.h
index 67cd860..a18c07b 100644
--- a/quic/core/quic_constants.h
+++ b/quic/core/quic_constants.h
@@ -57,6 +57,9 @@
 // We match SPDY's use of 32 (since we'd compete with SPDY).
 const QuicPacketCount kInitialCongestionWindow = 32;
 
+// Do not allow initial congestion window to be greater than 200 packets.
+const QuicPacketCount kMaxInitialCongestionWindow = 200;
+
 // Minimum size of initial flow control window, for both stream and session.
 const uint32_t kMinimumFlowControlSendWindow = 16 * 1024;  // 16 KB