Along with sending the SCUP message, this CL includes small fixes which

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
diff --git a/net/quic/quic_protocol.cc b/net/quic/quic_protocol.cc
index c587c56f8dd22da51ce47fa3a758f9590dc6c100..419820a8c1ceeb5d5a761e77924ae771ff4a8e0c 100644
--- a/net/quic/quic_protocol.cc
+++ b/net/quic/quic_protocol.cc
@@ -169,6 +169,8 @@ QuicTag QuicVersionToQuicTag(const QuicVersion version) {
       return MakeQuicTag('Q', '0', '2', '0');
     case QUIC_VERSION_21:
       return MakeQuicTag('Q', '0', '2', '1');
+    case QUIC_VERSION_22:
+      return MakeQuicTag('Q', '0', '2', '2');
     default:
       // This shold be an ERROR because we should never attempt to convert an
       // invalid QuicVersion to be written to the wire.
@@ -200,6 +202,7 @@ string QuicVersionToString(const QuicVersion version) {
     RETURN_STRING_LITERAL(QUIC_VERSION_19);
     RETURN_STRING_LITERAL(QUIC_VERSION_20);
     RETURN_STRING_LITERAL(QUIC_VERSION_21);
+    RETURN_STRING_LITERAL(QUIC_VERSION_22);
     default:
       return "QUIC_VERSION_UNSUPPORTED";
   }