Create a QUIC connection option to set the min CWND to 1 packet instead

net/quic/crypto/crypto_protocol.h

Index: net/quic/crypto/crypto_protocol.h
diff --git a/net/quic/crypto/crypto_protocol.h b/net/quic/crypto/crypto_protocol.h
index 821874e04ceb36356a9a1d8a99fbd6c6b3f4b854..fdfcf9863907e676789ce66bd7d0a5e1381f8e22 100644
--- a/net/quic/crypto/crypto_protocol.h
+++ b/net/quic/crypto/crypto_protocol.h
@@ -60,6 +60,7 @@ const QuicTag kNTLP = TAG('N', 'T', 'L', 'P');   // No tail loss probe
 const QuicTag kNCON = TAG('N', 'C', 'O', 'N');   // N Connection Congestion Ctrl
 const QuicTag kNRTO = TAG('N', 'R', 'T', 'O');   // CWND reduction on loss
 const QuicTag kTIME = TAG('T', 'I', 'M', 'E');   // Time based
+const QuicTag kMIN1 = TAG('M', 'I', 'N', '1');   // Min CWND of 1 packet
 
 // Optional support of truncated Connection IDs.  If sent by a peer, the value
 // is the minimum number of bytes allowed for the connection ID sent to the