Replace wstring with string16 in sandbox

sandbox/win/tests/validation_tests/commands.h

 // 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.
 
 #ifndef SANDBOX_TESTS_VALIDATION_TESTS_COMMANDS_H__
 #define SANDBOX_TESTS_VALIDATION_TESTS_COMMANDS_H__
 
+#include <windows.h>
+
+#include "base/strings/string16.h"
+
 namespace sandbox {
 
 // Checks if window is a real window. Returns a SboxTestResult.
 int TestValidWindow(HWND window);
 
 // Tries to open the process_id. Returns a SboxTestResult.
 int TestOpenProcess(DWORD process_id, DWORD access_mask);
 
 // Tries to open thread_id. Returns a SboxTestResult.
 int TestOpenThread(DWORD thread_id);
 
 // Tries to open path for read access. Returns a SboxTestResult.
-int TestOpenReadFile(const std::wstring& path);
+int TestOpenReadFile(const base::string16& path);
 
 // Tries to open path for write access. Returns a SboxTestResult.
-int TestOpenWriteFile(const std::wstring& path);
+int TestOpenWriteFile(const base::string16& path);
 
 // Tries to open a registry key.
-int TestOpenKey(HKEY base_key, std::wstring subkey);
+int TestOpenKey(HKEY base_key, base::string16 subkey);
 
 // Tries to open the workstation's input desktop as long as the
 // current desktop is not the interactive one. Returns a SboxTestResult.
 int TestOpenInputDesktop();
 
 // Tries to switch the interactive desktop. Returns a SboxTestResult.
 int TestSwitchDesktop();
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_TESTS_VALIDATION_TESTS_COMMANDS_H__