Cleanup usage of scoped_ptr<> in remoting for C++11

remoting/protocol/negotiating_authenticator_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 "base/bind.h"
 #include "net/base/net_errors.h"
 #include "remoting/base/rsa_key_pair.h"
 #include "remoting/protocol/authenticator_test_base.h"
 #include "remoting/protocol/channel_authenticator.h"
 #include "remoting/protocol/connection_tester.h"
@@ skipping 61 matching lines @@
           AuthenticationMethod::NONE));
     }
     bool pairing_expected = pairing_registry_.get() != NULL;
     FetchSecretCallback fetch_secret_callback =
         base::Bind(&NegotiatingAuthenticatorTest::FetchSecret,
                    client_interactive_pin,
                    pairing_expected);
     client_as_negotiating_authenticator_ = new NegotiatingClientAuthenticator(
         client_id, client_paired_secret,
         kTestHostId, fetch_secret_callback,
-        scoped_ptr<ThirdPartyClientAuthenticator::TokenFetcher>(), methods);
+        nullptr, methods);
     client_.reset(client_as_negotiating_authenticator_);
   }
 
   void CreatePairingRegistry(bool with_paired_client) {
     pairing_registry_ = new SynchronousPairingRegistry(
         scoped_ptr<PairingRegistry::Delegate>(
             new MockPairingRegistryDelegate()));
     if (with_paired_client) {
       PairingRegistry::Pairing pairing(
           base::Time(), kTestClientName, kTestClientId, kTestPairedSecret);
@@ skipping 155 matching lines @@
   CreatePairingRegistry(true);
   ASSERT_NO_FATAL_FAILURE(InitAuthenticators(
       kTestClientId, kTestPairedSecretBad, kTestPinBad, kTestPin,
       AuthenticationMethod::HMAC_SHA256, false));
   ASSERT_NO_FATAL_FAILURE(RunAuthExchange());
   VerifyRejected(Authenticator::INVALID_CREDENTIALS);
 }
 
 }  // namespace protocol
 }  // namespace remoting