Update HTTP/2 NPN/ALPN tokens to "h2-12" to advertise draft 12 support.

net/http/http_response_info.cc

 // 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.
 
 #include "net/http/http_response_info.h"
 
 #include "base/logging.h"
 #include "base/pickle.h"
 #include "base/time/time.h"
 #include "net/base/auth.h"
@@ skipping 376 matching lines @@
   switch (connection_info) {
     case CONNECTION_INFO_UNKNOWN:
       return "unknown";
     case CONNECTION_INFO_HTTP1:
       return "http/1";
     case CONNECTION_INFO_DEPRECATED_SPDY2:
       return "spdy/2";
     case CONNECTION_INFO_SPDY3:
       return "spdy/3";
     case CONNECTION_INFO_SPDY4:
-      // This is the HTTP/2 draft 11 identifier. For internal
+      // This is the HTTP/2 draft 12 identifier. For internal
       // consistency, HTTP/2 is named SPDY4 within Chromium.
-      return "h2-11";
+      return "h2-12";
     case CONNECTION_INFO_QUIC1_SPDY3:
       return "quic/1+spdy/3";
     case NUM_OF_CONNECTION_INFOS:
       break;
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace net