[SPDY] Remove references to obsolete SPDY versions SPDY/1 and SPDY/2.1

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 327 matching lines @@
       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:
-    case kProtoSPDY1:
-    case kProtoSPDY21:
       break;
   }
 
   NOTREACHED();
   return CONNECTION_INFO_UNKNOWN;
 }
 
 // static
 std::string HttpResponseInfo::ConnectionInfoToString(
     ConnectionInfo connection_info) {
@@ skipping 13 matching lines @@
     case CONNECTION_INFO_QUIC1_SPDY3:
       return "quic/1+spdy/3";
     case NUM_OF_CONNECTION_INFOS:
       break;
   }
   NOTREACHED();
   return "";
 }
 
 }  // namespace net