Add HTTP/2 RFC link in comment.

net/socket/next_proto.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_SOCKET_NEXT_PROTO_H_
 #define NET_SOCKET_NEXT_PROTO_H_
 
 #include <vector>
 
 #include "net/base/net_export.h"
@@ skipping 15 matching lines @@
   kProtoDeprecatedSPDY2 = 100,
   kProtoSPDYMinimumVersion = kProtoDeprecatedSPDY2,
   kProtoSPDYHistogramOffset = kProtoDeprecatedSPDY2,
   kProtoSPDY3 = 101,
   kProtoSPDY31 = 102,
   kProtoSPDY4_14 = 103,  // HTTP/2 draft-14, designated implementation draft.
   kProtoSPDY4MinimumVersion = kProtoSPDY4_14,
   // kProtoSPDY4_15 = 104,  // HTTP/2 draft-15
   // kProtoSPDY4_16 = 105,  // HTTP/2 draft-16
   // kProtoSPDY4_17 = 106,  // HTTP/2 draft-17
-  kProtoSPDY4 = 107,  // HTTP/2.  TODO(bnc):  Add RFC number when published.
+  kProtoSPDY4 = 107,  // HTTP/2, see https://tools.ietf.org/html/rfc7540.

[Ryan Hamilton, 2015/05/18 14:30:59]

I'm surprised that git cl format didn't line up these comments.  Man, I sure
don't understand that tool.

[Bence, 2015/05/18 14:35:56]

Maybe because lines 33--35 are commented out, so the second sets of // are in
comments which git cl format does not touch?  Just guessing.

   kProtoSPDY4MaximumVersion = kProtoSPDY4,
   kProtoSPDYMaximumVersion = kProtoSPDY4MaximumVersion,
 
   kProtoQUIC1SPDY3 = 200,
 
   kProtoMaximumVersion = kProtoQUIC1SPDY3,
 };
 
 // List of protocols to use for NPN, used for configuring HttpNetworkSessions.
 typedef std::vector<NextProto> NextProtoVector;
 
 // Convenience functions to create NextProtoVector.
 
 // Default values, which are subject to change over time.
 NET_EXPORT NextProtoVector NextProtosDefaults();
 
 // Enable SPDY/3.1 and QUIC, but not HTTP/2.
 NET_EXPORT NextProtoVector NextProtosSpdy31();
 
 // Control SPDY/3.1 and HTTP/2 separately.
 NET_EXPORT NextProtoVector NextProtosWithSpdyAndQuic(bool spdy_enabled,
                                                      bool quic_enabled);
 
 // Returns true if |next_proto| is a version of SPDY or HTTP/2.
 bool NextProtoIsSPDY(NextProto next_proto);
 
 }  // namespace net
 
 #endif  // NET_SOCKET_NEXT_PROTO_H_