replace NULL->nullptr in src/remoting.

remoting/protocol/authenticator_test_base.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/authenticator_test_base.h"
 
 #include "base/base64.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/test/test_timeouts.h"
@@ skipping 133 matching lines @@
   shutdown_timer.Start(FROM_HERE,
                        TestTimeouts::action_timeout(),
                        base::MessageLoop::QuitClosure());
   message_loop_.Run();
   shutdown_timer.Stop();
 
   testing::Mock::VerifyAndClearExpectations(&client_callback_);
   testing::Mock::VerifyAndClearExpectations(&host_callback_);
 
   if (!expected_fail) {
-    ASSERT_TRUE(client_socket_.get() != NULL);
-    ASSERT_TRUE(host_socket_.get() != NULL);
+    ASSERT_TRUE(client_socket_.get() != nullptr);
+    ASSERT_TRUE(host_socket_.get() != nullptr);
   }
 }
 
 void AuthenticatorTestBase::OnHostConnected(
     int error,
     scoped_ptr<net::StreamSocket> socket) {
   host_callback_.OnDone(error);
   host_socket_ = socket.Pass();
 }
 
 void AuthenticatorTestBase::OnClientConnected(
     int error,
     scoped_ptr<net::StreamSocket> socket) {
   client_callback_.OnDone(error);
   client_socket_ = socket.Pass();
 }
 
 }  // namespace protocol
 }  // namespace remoting