// Copyright 2017 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef UI_LINUX_DEVICE_SCALE_FACTOR_OBSERVER_H_ #define UI_LINUX_DEVICE_SCALE_FACTOR_OBSERVER_H_ namespace ui { class DeviceScaleFactorObserver { … }; } // namespace ui #endif // UI_LINUX_DEVICE_SCALE_FACTOR_OBSERVER_H_