Land Recent QUIC Changes.

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 c508147944df17916c54a897255f05303de8260d..49194e90b3d71dfb6c2b2142953028ae446d89d2 100644
--- a/net/quic/crypto/crypto_protocol.h
+++ b/net/quic/crypto/crypto_protocol.h
@@ -47,6 +47,9 @@ const QuicTag kQBIC = TAG('Q', 'B', 'I', 'C');  // TCP cubic
 const QuicTag kPACE = TAG('P', 'A', 'C', 'E');  // Paced TCP cubic
 const QuicTag kINAR = TAG('I', 'N', 'A', 'R');  // Inter arrival
 
+// Congestion control options
+const QuicTag kTBBR = TAG('T', 'B', 'B', 'R');  // Reduced Buffer Bloat TCP
+
 // Loss detection algorithm types
 const QuicTag kNACK = TAG('N', 'A', 'C', 'K');  // TCP style nack counting
 const QuicTag kTIME = TAG('T', 'I', 'M', 'E');  // Time based
@@ -68,6 +71,7 @@ const QuicTag kAEAD = TAG('A', 'E', 'A', 'D');  // Authenticated
                                                 // encryption algorithms
 const QuicTag kCGST = TAG('C', 'G', 'S', 'T');  // Congestion control
                                                 // feedback types
+const QuicTag kCOPT = TAG('C', 'O', 'P', 'T');  // Congestion control options
 // kLOSS was 'L', 'O', 'S', 'S', but was changed from a tag vector to a tag.
 const QuicTag kLOSS = TAG('L', 'O', 'S', 'A');  // Loss detection algorithms
 const QuicTag kICSL = TAG('I', 'C', 'S', 'L');  // Idle connection state