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

net/http/http_server_properties.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_server_properties.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/stringprintf.h"
 
 namespace net {
 
 const char kAlternateProtocolHeader[] = "Alternate-Protocol";
 
 namespace {
 
 // The order of these strings much match the order of the enum definition
 // for AlternateProtocol.
 const char* const kAlternateProtocolStrings[] = {
   "npn-spdy/2",
   "npn-spdy/3",
   "npn-spdy/3.1",
-  "npn-h2-11",  // HTTP/2 draft 11. Called SPDY4 internally.
+  "npn-h2-12",  // HTTP/2 draft 12. Called SPDY4 internally.
   "quic"
 };
 const char kBrokenAlternateProtocol[] = "Broken";
 
 COMPILE_ASSERT(
     arraysize(kAlternateProtocolStrings) == NUM_VALID_ALTERNATE_PROTOCOLS,
     kAlternateProtocolStringsSize_kNumValidAlternateProtocols_not_equal);
 
 }  // namespace
 
@@ skipping 65 matching lines @@
   NOTREACHED() << "Invalid NextProto: " << next_proto;
   return UNINITIALIZED_ALTERNATE_PROTOCOL;
 }
 
 std::string PortAlternateProtocolPair::ToString() const {
   return base::StringPrintf("%d:%s", port,
                             AlternateProtocolToString(protocol));
 }
 
 }  // namespace net