Merge 101684 - Added CopyRegKeyWorkItem in support of IE low rights policy fixes.

chrome/installer/util/registry_key_backup.cc

 // 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.
 
 #include "chrome/installer/util/registry_key_backup.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 301 matching lines @@
     } else {
       success = key_data_->WriteTo(&dest_key);
       LOG_IF(ERROR, !success) << "Failed to write key data.";
     }
   } else {
     success = true;
   }
 
   return success;
 }