Replace wstring with string16 in sandbox

sandbox/win/src/named_pipe_dispatcher.h

 // Copyright (c) 2010 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_SRC_NAMED_PIPE_DISPATCHER_H__
 #define SANDBOX_SRC_NAMED_PIPE_DISPATCHER_H__
 
 #include "base/basictypes.h"
+#include "base/strings/string16.h"
 #include "sandbox/win/src/crosscall_server.h"
 #include "sandbox/win/src/sandbox_policy_base.h"
 
 namespace sandbox {
 
 // This class handles named pipe related IPC calls.
 class NamedPipeDispatcher : public Dispatcher {
  public:
   explicit NamedPipeDispatcher(PolicyBase* policy_base);
   ~NamedPipeDispatcher() {}
 
   // Dispatcher interface.
   virtual bool SetupService(InterceptionManager* manager, int service);
 
  private:
   // Processes IPC requests coming from calls to CreateNamedPipeW() in the
   // target.
-  bool CreateNamedPipe(IPCInfo* ipc, std::wstring* name, DWORD open_mode,
+  bool CreateNamedPipe(IPCInfo* ipc, base::string16* name, DWORD open_mode,
                        DWORD pipe_mode, DWORD max_instances,
                        DWORD out_buffer_size, DWORD in_buffer_size,
                        DWORD default_timeout);
 
   PolicyBase* policy_base_;
   DISALLOW_COPY_AND_ASSIGN(NamedPipeDispatcher);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_SRC_NAMED_PIPE_DISPATCHER_H__