app_list: Search result launch history and boost.

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"
 #include "base/timer.h"
 #include "chrome/browser/ui/app_list/search/mixer.h"
 #include "ui/app_list/app_list_model.h"
 
 class AppListControllerDelegate;
 class Profile;
 
 namespace app_list {
 
+class History;
 class SearchBoxModel;
 class SearchProvider;
 class SearchResult;
 
 // Controller that collects query from given SearchBoxModel, dispatches it
 // to all search providers, then invokes the mixer to mix and to publish the
 // results to the given SearchResults UI model.
 class SearchController {
  public:
   SearchController(Profile* profile,
@@ skipping 22 matching lines @@
   // Invoked when the search results are changed.
   void OnResultsChanged();
 
   Profile* profile_;
   SearchBoxModel* search_box_;
   AppListControllerDelegate* list_controller_;
 
   bool dispatching_query_;
   Providers providers_;
   scoped_ptr<Mixer> mixer_;
+  History* history_;  // BrowserContextKeyedService, 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_