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(