Fix in-use updates for Chrome Frame.

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_
 #pragma once
 
 #include <string>
 
@@ skipping 10 matching lines @@
 class CopyRegKeyWorkItem : public WorkItem {
  public:
   virtual ~CopyRegKeyWorkItem();
   virtual bool Do() OVERRIDE;
   virtual void Rollback() OVERRIDE;
 
  private:
   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);
+                     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_;
 
+  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_