Move Mac LaunchOnStartup enable/disable to File thread

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 250 matching lines @@
         'browser/automation/ui_controls_win.cc',
         'browser/automation/ui_controls.h',
         'browser/back_forward_menu_model.cc',
         'browser/back_forward_menu_model.h',
         'browser/background_application_list_model.cc',
         'browser/background_application_list_model.h',
         'browser/background_contents_service.cc',
         'browser/background_contents_service.h',
         'browser/background_mode_manager.cc',
         'browser/background_mode_manager.h',
+        'browser/background_mode_manager_chromeos.cc',
+        'browser/background_mode_manager_linux.cc',
+        'browser/background_mode_manager_mac.mm',
+        'browser/background_mode_manager_win.cc',
         'browser/background_page_tracker.cc',
         'browser/background_page_tracker.h',
         'browser/blocked_content_container.cc',
         'browser/blocked_content_container.h',
         'browser/bookmarks/bookmark_codec.cc',
         'browser/bookmarks/bookmark_codec.h',
         'browser/bookmarks/bookmark_context_menu_controller.cc',
         'browser/bookmarks/bookmark_context_menu_controller.h',
         'browser/bookmarks/bookmark_drop_info.cc',
         'browser/bookmarks/bookmark_drop_info.h',
@@ skipping 4087 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: