text: // Copyright 2014 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_OZONE_PLATFORM_DRI_CHANNEL_OBSERVER_H_
  #define UI_OZONE_PLATFORM_DRI_CHANNEL_OBSERVER_H_
  
  namespace ui {
  
  // Observes the channel state.
  class ChannelObserver {
   public:
    virtual ~ChannelObserver() {}
  
    virtual void OnChannelEstablished() = 0;
    virtual void OnChannelDestroyed() = 0;
  };
  
  }  // namespace ui
  
  #endif  // UI_OZONE_PLATFORM_DRI_CHANNEL_OBSERVER_H_
  