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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CHROMEOS_DEVICE_HIERARCHY_OBSERVER_H_
#define CHROME_BROWSER_CHROMEOS_DEVICE_HIERARCHY_OBSERVER_H_
#pragma once
namespace chromeos {
// Observers receive notifications when a device has been added/removed.
class DeviceHierarchyObserver {
public:
virtual void DeviceHierarchyChanged() = 0;
protected:
virtual ~DeviceHierarchyObserver() {}
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_DEVICE_HIERARCHY_OBSERVER_H_
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