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

net/quic/quic_protocol.h

Index: net/quic/quic_protocol.h
diff --git a/net/quic/quic_protocol.h b/net/quic/quic_protocol.h
index f24671a61c93f5fe047863c371e0509581240222..d91b55f3211aea309a54cc73d8f5e1fa6a79b4ca 100644
--- a/net/quic/quic_protocol.h
+++ b/net/quic/quic_protocol.h
@@ -281,6 +281,7 @@ enum QuicVersion {
   QUIC_VERSION_19 = 19,  // Connection level flow control.
   QUIC_VERSION_20 = 20,  // Independent stream/connection flow control windows.
   QUIC_VERSION_21 = 21,  // Headers/crypto streams are flow controlled.
+  QUIC_VERSION_22 = 22,  // Send Server Config Update messages on crypto stream.
 };
 
 // This vector contains QUIC versions which we currently support.
@@ -290,7 +291,8 @@ enum QuicVersion {
 //
 // IMPORTANT: if you are adding to this list, follow the instructions at
 // http://sites/quic/adding-and-removing-versions
-static const QuicVersion kSupportedQuicVersions[] = {QUIC_VERSION_21,
+static const QuicVersion kSupportedQuicVersions[] = {QUIC_VERSION_22,
+                                                     QUIC_VERSION_21,
                                                      QUIC_VERSION_20,
                                                      QUIC_VERSION_19,
                                                      QUIC_VERSION_18,