Browsing Belarusian translation

UNUSED: () OR (chromeos) OR (enable_media_router) OR (is_macosx or is_ios) == False
note: 'Default title for help dialogs during OOBE/login'
note: 'In the Google Drive settings menu, name of the Help item.'
note: 'The menu entry to show the app list help UI.'
note: 'The menu title of the Mac help menu.'
note: 'The text in the keyboard overlay to explain the shortcut.'
in: results/cr/chrome/app/generated_resources.grd, as IDS_HELP_MENU_MAC
in: results/cr/ui/strings/ui_strings.grd, as IDS_APP_LIST_HELP