ui/compositor/layer_observer.h

// Copyright 2016 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 UI_COMPOSITOR_LAYER_OBSERVER_H_
#define UI_COMPOSITOR_LAYER_OBSERVER_H_

#include "ui/compositor/compositor_export.h"

namespace ui {

class Layer;

// TODO(domlaskowski): This is only used for layer mirroring, so it should be
// removed and replaced by a private equivalent in the Layer class.
class COMPOSITOR_EXPORT LayerObserver {
 public:
  virtual void LayerDestroyed(Layer* layer) {}

 protected:
  virtual ~LayerObserver() {}
};

}  // namespace ui

#endif  // UI_COMPOSITOR_LAYER_OBSERVER_H_