DispatchBrightnessChangedEvent   24 chrome/browser/chromeos/extensions/extension_system_event_observer.cc   extensions::DispatchBrightnessChangedEvent(level, user_initiated);
DispatchBrightnessChangedEvent   55 chrome/browser/extensions/api/system_private/system_private_api.h void DispatchBrightnessChangedEvent(int brightness, bool user_initiated);