Add rollback support to DeleteRegKeyWorkItem....

chrome/chrome_installer.gypi

 # 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.
 
 {
   'variables': {
     'lastchange_path': '<(SHARED_INTERMEDIATE_DIR)/build/LASTCHANGE',
     # 'branding_dir' is set in the 'conditions' section at the bottom.
   },
   'conditions': [
@@ skipping 65 matching lines @@
           ],
           'sources': [
             'installer/setup/compat_checks_unittest.cc',
             'installer/setup/setup_constants.cc',
             'installer/util/browser_distribution_unittest.cc',
             'installer/util/channel_info_unittest.cc',
             'installer/util/copy_tree_work_item_unittest.cc',
             'installer/util/create_dir_work_item_unittest.cc',
             'installer/util/create_reg_key_work_item_unittest.cc',
             'installer/util/delete_after_reboot_helper_unittest.cc',
+            'installer/util/delete_reg_key_work_item_unittest.cc',
             'installer/util/delete_reg_value_work_item_unittest.cc',
             'installer/util/delete_tree_work_item_unittest.cc',
             'installer/util/google_chrome_distribution_unittest.cc',
             'installer/util/google_update_settings_unittest.cc',
             'installer/util/install_util_unittest.cc',
             'installer/util/installation_validator_unittest.cc',
             'installer/util/installation_validation_helper.cc',
             'installer/util/installation_validation_helper.h',
             'installer/util/installer_state_unittest.cc',
             'installer/util/installer_util_unittests.rc',
@@ skipping 801 matching lines @@
       },
     }],
   ],
 }
 
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