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      1 // Copyright (c) 2012 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 CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_OBSERVER_H_
      6 #define CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_OBSERVER_H_
      7 
      8 #include "chrome/browser/ui/search/search_model.h"
      9 
     10 // This class defines the observer interface for the |SearchModel|.
     11 class SearchModelObserver {
     12  public:
     13   // Informs the observer that the model's state has changed.
     14   virtual void ModelChanged(const SearchModel::State& old_state,
     15                             const SearchModel::State& new_state) = 0;
     16 
     17  protected:
     18   virtual ~SearchModelObserver() {}
     19 };
     20 
     21 #endif  // CHROME_BROWSER_UI_SEARCH_SEARCH_MODEL_OBSERVER_H_
     22