[SPDY] Add flag and about:flags entry for SPDY/4 alpha 1

net/spdy/spdy_network_transaction_spdy3_unittest.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_network_transaction.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 122 matching lines @@
             session_deps_.get());
       HttpStreamFactory::set_use_alternate_protocols(false);
       HttpStreamFactory::set_force_spdy_over_ssl(false);
       HttpStreamFactory::set_force_spdy_always(false);
 
       std::vector<std::string> next_protos;
       next_protos.push_back("http/1.1");
       next_protos.push_back("spdy/2");
       next_protos.push_back("spdy/3");
       next_protos.push_back("spdy/3.1");
+      next_protos.push_back("spdy/4a1");
 
       switch (test_type_) {
         case SPDYNPN:
           session_->http_server_properties()->SetAlternateProtocol(
               HostPortPair("www.google.com", 80), 443,
               NPN_SPDY_3);
           HttpStreamFactory::set_use_alternate_protocols(true);
           HttpStreamFactory::SetNextProtos(next_protos);
           break;
         case SPDYNOSSL:
@@ skipping 6311 matching lines @@
   // And now we can allow everything else to run to completion.
   data.SetStop(10);
   data.Run();
   EXPECT_EQ(OK, callback2.WaitForResult());
   EXPECT_EQ(OK, callback3.WaitForResult());
 
   helper.VerifyDataConsumed();
 }
 
 }  // namespace net