Add WOW64 support to the installer registry work items

chrome/installer/util/copy_reg_key_work_item.h

-// Copyright (c) 2011 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 CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_
-#define CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "chrome/installer/util/registry_key_backup.h"
-#include "chrome/installer/util/work_item.h"
-
-// A WorkItem subclass that replaces the contents of one registry key with that
-// of another (i.e., the destination is erased prior to the copy).  Be aware
-// that in the event of rollback the destination key's values and subkeys are
-// restored but the key and its subkeys take on their default security
-// descriptors.
-class CopyRegKeyWorkItem : public WorkItem {
- public:
-  virtual ~CopyRegKeyWorkItem();
-  virtual bool Do() OVERRIDE;
-  virtual void Rollback() OVERRIDE;
-
- private:
-  // Grant WorkItem access to the ctor (required by the existing WorkItem
-  // design).
-  friend class WorkItem;
-
-  // Neither |source_key_path| nor |dest_key_path| may be empty.
-  // Only ALWAYS and IF_NOT_PRESENT are supported for |overwrite_option|.
-  CopyRegKeyWorkItem(HKEY predefined_key,
-                     const std::wstring& source_key_path,
-                     const std::wstring& dest_key_path,
-                     CopyOverWriteOption overwrite_option);
-
-  // Root key in which we operate. The root key must be one of the predefined
-  // keys on Windows.
-  HKEY predefined_root_;
-
-  // Path of the key to be copied.
-  std::wstring source_key_path_;
-
-  // Path of the destination key.
-  std::wstring dest_key_path_;
-
-  // WorkItem::ALWAYS or WorkItem::IF_NOT_PRESENT.
-  CopyOverWriteOption overwrite_option_;
-
-  // Backup of the destination key.
-  RegistryKeyBackup backup_;
-
-  // Set to true after the destination is cleared for the copy.
-  bool cleared_destination_;
-
-  DISALLOW_COPY_AND_ASSIGN(CopyRegKeyWorkItem);
-};
-
-#endif  // CHROME_INSTALLER_UTIL_COPY_REG_KEY_WORK_ITEM_H_