Replace wstring with string16 in sandbox

sandbox/win/tests/common/controller.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_WIN_TESTS_COMMON_CONTROLLER_H_
 #define SANDBOX_WIN_TESTS_COMMON_CONTROLLER_H_
 
 #include <windows.h>
 #include <string>
 
+#include "base/strings/string16.h"
 #include "base/win/scoped_handle.h"
 #include "sandbox/win/src/sandbox.h"
 
 namespace sandbox {
 
 // See winerror.h for details.
 #define SEVERITY_INFO_FLAGS   0x40000000
 #define SEVERITY_ERROR_FLAGS  0xC0000000
 #define CUSTOMER_CODE         0x20000000
 #define SBOX_TESTS_FACILITY   0x05B10000
@@ skipping 120 matching lines @@
   bool no_sandbox_;
   bool kill_on_destruction_;
   base::win::ScopedHandle target_process_;
   DWORD target_process_id_;
 };
 
 // Returns the broker services.
 BrokerServices* GetBroker();
 
 // Constructs a full path to a file inside the system32 (or syswow64) folder.
-std::wstring MakePathToSys(const wchar_t* name, bool is_obj_man_path);
+base::string16 MakePathToSys(const wchar_t* name, bool is_obj_man_path);
 
 // Runs the given test on the target process.
 int DispatchCall(int argc, wchar_t **argv);
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_WIN_TESTS_COMMON_CONTROLLER_H_