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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef UI_DISPLAY_TYPES_NATIVE_DISPLAY_OBSERVER_H_
      6 #define UI_DISPLAY_TYPES_NATIVE_DISPLAY_OBSERVER_H_
      7 
      8 #include "ui/display/types/display_types_export.h"
      9 
     10 namespace ui {
     11 
     12 // Observer class used by NativeDisplayDelegate to announce when the display
     13 // configuration changes.
     14 class DISPLAY_TYPES_EXPORT NativeDisplayObserver {
     15  public:
     16   virtual ~NativeDisplayObserver() {}
     17 
     18   virtual void OnConfigurationChanged() = 0;
     19 };
     20 
     21 }  //  namespace ui
     22 
     23 #endif  // UI_DISPLAY_TYPES_NATIVE_DISPLAY_OBSERVER_H_
     24