Revert 139424 - Remove V1 authenticators.

remoting/protocol/it2me_host_authenticator_factory.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 "remoting/protocol/it2me_host_authenticator_factory.h"
 
 #include "base/logging.h"
 #include "crypto/rsa_private_key.h"
+#include "remoting/protocol/v1_authenticator.h"
 #include "remoting/protocol/negotiating_authenticator.h"
 
 namespace remoting {
 namespace protocol {
 
 It2MeHostAuthenticatorFactory::It2MeHostAuthenticatorFactory(
     const std::string& local_cert,
     const crypto::RSAPrivateKey& local_private_key,
     const std::string& shared_secret)
     : local_cert_(local_cert),
       local_private_key_(local_private_key.Copy()),
       shared_secret_(shared_secret) {
 }
 
 It2MeHostAuthenticatorFactory::~It2MeHostAuthenticatorFactory() {
 }
 
 scoped_ptr<Authenticator> It2MeHostAuthenticatorFactory::CreateAuthenticator(
     const std::string& local_jid,
     const std::string& remote_jid,
     const buzz::XmlElement* first_message) {
-  return NegotiatingAuthenticator::CreateForHost(
-      local_cert_, *local_private_key_, shared_secret_,
-      AuthenticationMethod::NONE);
+  if (NegotiatingAuthenticator::IsNegotiableMessage(first_message)) {
+    return NegotiatingAuthenticator::CreateForHost(
+        local_cert_, *local_private_key_, shared_secret_,
+        AuthenticationMethod::NONE);
+  }
+
+  return scoped_ptr<Authenticator>(new V1HostAuthenticator(
+      local_cert_, *local_private_key_, shared_secret_, remote_jid));
 }
 
 }  // namespace protocol
 }  // namespace remoting