Convert //chrome from scoped_ptr to std::unique_ptr

chrome/utility/importer/firefox_importer_unittest_utils_mac.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 "chrome/utility/importer/firefox_importer_unittest_utils.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 266 matching lines @@
  private:
   NSSDecryptor decryptor_;
   IPC::Sender* sender_;
 };
 
 // Entry function in child process.
 MULTIPROCESS_IPC_TEST_MAIN(NSSDecrypterChildProcess) {
   base::MessageLoopForIO main_message_loop;
   FFDecryptorClientChannelListener listener;
 
-  scoped_ptr<IPC::Channel> channel = IPC::Channel::CreateClient(
-      kTestChannelID, &listener);
+  std::unique_ptr<IPC::Channel> channel =
+      IPC::Channel::CreateClient(kTestChannelID, &listener);
   CHECK(channel->Connect());
   listener.SetSender(channel.get());
 
   // run message loop
   base::MessageLoop::current()->Run();
 
   return 0;
 }