[SPDY] Do not advertise SPDY/2 by default

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 313 matching lines @@
   if (was_npn_negotiated)
     pickle->WriteString(npn_negotiated_protocol);
 
   if (connection_info != CONNECTION_INFO_UNKNOWN)
     pickle->WriteInt(static_cast<int>(connection_info));
 }
 
 HttpResponseInfo::ConnectionInfo HttpResponseInfo::ConnectionInfoFromNextProto(
     NextProto next_proto) {
   switch (next_proto) {
-    case kProtoSPDY2:
-      return CONNECTION_INFO_SPDY2;
+    case kProtoDeprecatedSPDY2:
+      return CONNECTION_INFO_DEPRECATED_SPDY2;
     case kProtoSPDY3:
     case kProtoSPDY31:
       return CONNECTION_INFO_SPDY3;
     case kProtoSPDY4a2:
       return CONNECTION_INFO_SPDY4A2;
     case kProtoHTTP2Draft04:
       return CONNECTION_INFO_HTTP2_DRAFT_04;
     case kProtoQUIC1SPDY3:
       return CONNECTION_INFO_QUIC1_SPDY3;
 
     case kProtoUnknown:
     case kProtoHTTP11:
       break;
   }
 
   NOTREACHED();
   return CONNECTION_INFO_UNKNOWN;
 }
 
 // static
 std::string HttpResponseInfo::ConnectionInfoToString(
     ConnectionInfo connection_info) {
   switch (connection_info) {
     case CONNECTION_INFO_UNKNOWN:
       return "unknown";
     case CONNECTION_INFO_HTTP1:
       return "http/1";
-    case CONNECTION_INFO_SPDY2:
+    case CONNECTION_INFO_DEPRECATED_SPDY2:
       return "spdy/2";
     case CONNECTION_INFO_SPDY3:
       return "spdy/3";
     case CONNECTION_INFO_SPDY4A2:
       return "spdy/4a2";
     case CONNECTION_INFO_HTTP2_DRAFT_04:
       return "HTTP-draft-04/2.0";
     case CONNECTION_INFO_QUIC1_SPDY3:
       return "quic/1+spdy/3";
     case NUM_OF_CONNECTION_INFOS:
       break;
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace net