Add BackupRollbackController for starting backup/rollback

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1289 matching lines @@
         'browser/spellchecker/spellcheck_service_unittest.cc',
         'browser/spellchecker/spelling_service_client_unittest.cc',
         'browser/spellchecker/word_trimmer_unittest.cc',
         'browser/status_icons/status_icon_menu_model_unittest.cc',
         'browser/status_icons/status_icon_unittest.cc',
         'browser/status_icons/status_tray_unittest.cc',
         'browser/sync/about_sync_util_unittest.cc',
         'browser/sync/abstract_profile_sync_service_test.cc',
         'browser/sync/abstract_profile_sync_service_test.h',
         'browser/sync/backend_migrator_unittest.cc',
+        'browser/sync/backup_rollback_controller_unittest.cc',
         'browser/sync/glue/autofill_data_type_controller_unittest.cc',
         'browser/sync/glue/bookmark_data_type_controller_unittest.cc',
         'browser/sync/glue/browser_thread_model_worker_unittest.cc',
         'browser/sync/glue/data_type_manager_impl_unittest.cc',
         'browser/sync/glue/extensions_activity_monitor_unittest.cc',
         'browser/sync/glue/favicon_cache_unittest.cc',
         'browser/sync/glue/frontend_data_type_controller_mock.cc',
         'browser/sync/glue/frontend_data_type_controller_mock.h',
         'browser/sync/glue/frontend_data_type_controller_unittest.cc',
         'browser/sync/glue/non_frontend_data_type_controller_mock.cc',
@@ skipping 1521 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }