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// Copyright 2015 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 COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CONNECTION_OBSERVER_H_
#define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CONNECTION_OBSERVER_H_
namespace mus {
class Window;
class WindowTreeConnectionObserver {
public:
virtual void OnWindowTreeFocusChanged(Window* gained_focus,
Window* lost_focus) {}
protected:
virtual ~WindowTreeConnectionObserver() {}
};
} // namespace mus
#endif // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_TREE_CONNECTION_OBSERVER_H_
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