HandleBrightnessChanged  206 ash/system/chromeos/brightness/tray_brightness.cc     HandleBrightnessChanged(percent, false);
HandleBrightnessChanged  255 ash/system/chromeos/brightness/tray_brightness.cc   HandleBrightnessChanged(percent, user_initiated);
HandleBrightnessChanged   51 ash/system/chromeos/brightness/tray_brightness.h   void HandleBrightnessChanged(double percent, bool user_initiated);