Add a ListModel::Move.

ui/app_list/search_result_list_view.cc

Index: ui/app_list/search_result_list_view.cc
diff --git a/ui/app_list/search_result_list_view.cc b/ui/app_list/search_result_list_view.cc
index ea1766b4116df51f83bc38ca378e19d6ce14d5d7..b3f86c695c28df00b0ce0236d4762709d9b35dab 100644
--- a/ui/app_list/search_result_list_view.cc
+++ b/ui/app_list/search_result_list_view.cc
@@ -139,6 +139,10 @@ void SearchResultListView::ListItemsRemoved(size_t start, size_t count) {
   ScheduleUpdate();
 }
 
+void SearchResultListView::ListItemMoved(size_t index, size_t target_index) {
+  NOTREACHED();
+}
+
 void SearchResultListView::ListItemsChanged(size_t start, size_t count) {
   ScheduleUpdate();
 }