Update from https://crrev.com/302630

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 2509f6ffb3cfa3ad0ec79611c946281a619e5416..d010776c2945abef76612e90a1ac5e57b09a57ad 100644
--- a/net/quic/crypto/crypto_protocol.h
+++ b/net/quic/crypto/crypto_protocol.h
@@ -57,6 +57,7 @@ const QuicTag kIW10 = TAG('I', 'W', '1', '0');   // Force ICWND to 10
 const QuicTag kPACE = TAG('P', 'A', 'C', 'E');   // Paced TCP cubic
 const QuicTag k1CON = TAG('1', 'C', 'O', 'N');   // Emulate a single connection
 const QuicTag kNTLP = TAG('N', 'T', 'L', 'P');   // No tail loss probe
+const QuicTag kNCON = TAG('N', 'C', 'O', 'N');   // N Connection Congestion Ctrl
 
 // Loss detection algorithm types
 const QuicTag kNACK = TAG('N', 'A', 'C', 'K');   // TCP style nack counting