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

remoting/host/setup/me2me_native_messaging_host_unittest.cc

 // Copyright 2013 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/host/setup/me2me_native_messaging_host.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ skipping 310 matching lines @@
 
   scoped_refptr<PairingRegistry> pairing_registry =
       new SynchronousPairingRegistry(scoped_ptr<PairingRegistry::Delegate>(
           new MockPairingRegistryDelegate()));
 
   scoped_ptr<extensions::NativeMessagingChannel> channel(
       new PipeMessagingChannel(input_read_file.Pass(),
                                output_write_file.Pass()));
 
   host_.reset(new Me2MeNativeMessagingHost(
-        false,
-        0,
-        channel.Pass(),
-        daemon_controller,
-        pairing_registry,
-        scoped_ptr<remoting::OAuthClient>()));
+      false, 0, channel.Pass(), daemon_controller, pairing_registry, nullptr));
   host_->Start(base::Bind(&Me2MeNativeMessagingHostTest::StopHost,
                           base::Unretained(this)));
 
   // Notify the test that the host has finished starting up.
   test_message_loop_->message_loop_proxy()->PostTask(
       FROM_HERE, test_run_loop_->QuitClosure());
 }
 
 void Me2MeNativeMessagingHostTest::StopHost() {
   DCHECK(host_task_runner_->RunsTasksOnCurrentThread());
@@ skipping 35 matching lines @@
   // to it. So the only handle left to close is |output_read_file_|.
   output_read_file_.Close();
 }
 
 scoped_ptr<base::DictionaryValue>
 Me2MeNativeMessagingHostTest::ReadMessageFromOutputPipe() {
   uint32 length;
   int read_result = output_read_file_.ReadAtCurrentPos(
       reinterpret_cast<char*>(&length), sizeof(length));
   if (read_result != sizeof(length)) {
-    return scoped_ptr<base::DictionaryValue>();
+    return nullptr;
   }
 
   std::string message_json(length, '\0');
   read_result = output_read_file_.ReadAtCurrentPos(
       string_as_array(&message_json), length);
   if (read_result != static_cast<int>(length)) {
-    return scoped_ptr<base::DictionaryValue>();
+    return nullptr;
   }
 
   scoped_ptr<base::Value> message(base::JSONReader::Read(message_json));
   if (!message || !message->IsType(base::Value::TYPE_DICTIONARY)) {
-    return scoped_ptr<base::DictionaryValue>();
+    return nullptr;
   }
 
   return scoped_ptr<base::DictionaryValue>(
       static_cast<base::DictionaryValue*>(message.release()));
 }
 
 void Me2MeNativeMessagingHostTest::WriteMessageToInputPipe(
     const base::Value& message) {
   std::string message_json;
   base::JSONWriter::Write(&message, &message_json);
@@ skipping 185 matching lines @@
 
 // Verify rejection if startDaemon request has no "consent" parameter.
 TEST_F(Me2MeNativeMessagingHostTest, StartDaemonNoConsent) {
   base::DictionaryValue message;
   message.SetString("type", "startDaemon");
   message.Set("config", base::DictionaryValue().DeepCopy());
   TestBadRequest(message);
 }
 
 }  // namespace remoting