Allow AppSearchProvider to provide recommendations.

ui/app_list/search_result.h

 // Copyright (c) 2012 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_APP_LIST_SEARCH_RESULT_H_
 #define UI_APP_LIST_SEARCH_RESULT_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 71 matching lines @@
   const Tags& title_tags() const { return title_tags_; }
   void set_title_tags(const Tags& tags) { title_tags_ = tags; }
 
   const base::string16& details() const { return details_; }
   void set_details(const base::string16& details) { details_ = details; }
 
   const Tags& details_tags() const { return details_tags_; }
   void set_details_tags(const Tags& tags) { details_tags_ = tags; }
 
   const std::string& id() const { return id_; }
-  double relevance() { return relevance_; }
+  double relevance() const { return relevance_; }
 
   const Actions& actions() const {
     return actions_;
   }
   void SetActions(const Actions& sets);
 
   bool is_installing() const { return is_installing_; }
   void SetIsInstalling(bool is_installing);
 
   int percent_downloaded() const { return percent_downloaded_; }
@@ skipping 38 matching lines @@
   int percent_downloaded_;
 
   ObserverList<SearchResultObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchResult);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_SEARCH_RESULT_H_