Allow AppSearchProvider to provide recommendations.

chrome/browser/ui/app_list/search/search_controller.h

 // Copyright 2013 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 CHROME_BROWSER_UI_APP_LIST_SEARCH_SEARCH_CONTROLLER_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_SEARCH_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 20 matching lines @@
  public:
   SearchController(Profile* profile,
                    SearchBoxModel* search_box,
                    AppListModel::SearchResults* results,
                    SpeechUIModel* speech_ui,
                    AppListControllerDelegate* list_controller);
   virtual ~SearchController();
 
   void Init();
 
+  void FetchRecommendations();
   void Start();
   void Stop();
 
   void OpenResult(SearchResult* result, int event_flags);
   void InvokeResultAction(SearchResult* result,
                           int action_index,
                           int event_flags);
 
  private:
   typedef ScopedVector<SearchProvider> Providers;
 
+  // Starts the timer which will stop all providers if they time out.
+  void InitiateStopTimer();
+
   // Takes ownership of |provider| and associates it with given mixer group.
   void AddProvider(Mixer::GroupId group,
                    scoped_ptr<SearchProvider> provider);
 
   // Invoked when the search results are changed.
   void OnResultsChanged();
 
   // SpeechUIModelObserver overrides:
   virtual void OnSpeechRecognitionStateChanged(
       SpeechRecognitionState new_state) OVERRIDE;
 
   Profile* profile_;
   SearchBoxModel* search_box_;
   SpeechUIModel* speech_ui_;
   AppListControllerDelegate* list_controller_;
 
   bool dispatching_query_;
   Providers providers_;
   scoped_ptr<Mixer> mixer_;
   History* history_;  // KeyedService, not owned.
 
   base::OneShotTimer<SearchController> stop_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchController);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_SEARCH_CONTROLLER_H_