Sort experimental app list search result groups.

ui/app_list/views/search_result_container_view.h

Index: ui/app_list/views/search_result_container_view.h
diff --git a/ui/app_list/views/search_result_container_view.h b/ui/app_list/views/search_result_container_view.h
index 8390eb6c84e3a27203cd074b1fd13133ca9eee35..3dd95b7be2bd8a6a7ae9b27d775cde786b5211cc 100644
--- a/ui/app_list/views/search_result_container_view.h
+++ b/ui/app_list/views/search_result_container_view.h
@@ -40,6 +40,9 @@ class APP_LIST_EXPORT SearchResultContainerView : public views::View,
 
   int num_results() const { return num_results_; }
 
+  void set_container_score(double score) { container_score_ = score; }
+  double container_score() const { return container_score_; }
+
   // Schedules an Update call using |update_factory_|. Do nothing if there is a
   // pending call.
   void ScheduleUpdate();
@@ -68,6 +71,8 @@ class APP_LIST_EXPORT SearchResultContainerView : public views::View,
   int selected_index_;
   int num_results_;
 
+  double container_score_;
+
   AppListModel::SearchResults* results_;  // Owned by AppListModel.
 
   // The factory that consolidates multiple Update calls into one.