Remove unused SPDY/3 enum values.

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 371 matching lines @@
   if (connection_info != CONNECTION_INFO_UNKNOWN)
     pickle->WriteInt(static_cast<int>(connection_info));
 
   if (ssl_info.is_valid() && ssl_info.key_exchange_info != 0)
     pickle->WriteInt(ssl_info.key_exchange_info);
 }
 
 HttpResponseInfo::ConnectionInfo HttpResponseInfo::ConnectionInfoFromNextProto(
     NextProto next_proto) {
   switch (next_proto) {
-    case kProtoSPDY3:
     case kProtoSPDY31:
       return CONNECTION_INFO_SPDY3;
     case kProtoHTTP2:
       return CONNECTION_INFO_HTTP2;
     case kProtoQUIC1SPDY3:
       return CONNECTION_INFO_QUIC1_SPDY3;
 
     case kProtoUnknown:
     case kProtoHTTP11:
       break;
@@ skipping 27 matching lines @@
     case CONNECTION_INFO_QUIC1_SPDY3:
       return "quic/1+spdy/3";
     case NUM_OF_CONNECTION_INFOS:
       break;
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace net