HandleBrightnessDown 988 ash/accelerators/accelerator_controller.cc return brightness_control_delegate_->HandleBrightnessDown(accelerator); HandleBrightnessDown 23 ash/system/brightness_control_delegate.h virtual bool HandleBrightnessDown(const ui::Accelerator& accelerator) = 0; HandleBrightnessDown 25 ash/system/chromeos/brightness/brightness_controller_chromeos.h virtual bool HandleBrightnessDown(