Convert //sandbox to use std::unique_ptr

sandbox/linux/services/namespace_sandbox_unittest.cc

 // Copyright 2015 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 "sandbox/linux/services/namespace_sandbox.h"
 
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include <string>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/process/launch.h"
 #include "base/process/process.h"
 #include "base/test/multiprocess_test.h"
 #include "sandbox/linux/services/credentials.h"
 #include "sandbox/linux/services/namespace_utils.h"
 #include "sandbox/linux/services/proc_util.h"
 #include "sandbox/linux/tests/unit_tests.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/multiprocess_func_list.h"
 
@@ skipping 203 matching lines @@
   CHECK(!NamespaceSandbox::InstallTerminationSignalHandler(
             SIGUSR1, NamespaceSandbox::SignalExitCode(SIGUSR1)));
 
   raise(SIGUSR1);
   CHECK_EQ(1, signal_handler_called);
 }
 
 }  // namespace
 
 }  // namespace sandbox