Replace wstring with string16 in sandbox

sandbox/win/src/registry_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_REGISTRY_DISPATCHER_H_
 #define SANDBOX_SRC_REGISTRY_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 registry-related IPC calls.
 class RegistryDispatcher : public Dispatcher {
  public:
   explicit RegistryDispatcher(PolicyBase* policy_base);
   ~RegistryDispatcher() {}
 
   // Dispatcher interface.
   virtual bool SetupService(InterceptionManager* manager, int service);
 
  private:
   // Processes IPC requests coming from calls to NtCreateKey in the target.
-  bool NtCreateKey(IPCInfo* ipc, std::wstring* name, DWORD attributes,
+  bool NtCreateKey(IPCInfo* ipc, base::string16* name, DWORD attributes,
                    HANDLE root, DWORD desired_access,
                    DWORD title_index, DWORD create_options);
 
   // Processes IPC requests coming from calls to NtOpenKey in the target.
-  bool NtOpenKey(IPCInfo* ipc, std::wstring* name, DWORD attributes,
+  bool NtOpenKey(IPCInfo* ipc, base::string16* name, DWORD attributes,
                  HANDLE root, DWORD desired_access);
 
   PolicyBase* policy_base_;
   DISALLOW_COPY_AND_ASSIGN(RegistryDispatcher);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_SRC_REGISTRY_DISPATCHER_H_