Cleanup MenuRunner API

ui/app_list/views/search_result_tile_item_view.cc

Index: ui/app_list/views/search_result_tile_item_view.cc
diff --git a/ui/app_list/views/search_result_tile_item_view.cc b/ui/app_list/views/search_result_tile_item_view.cc
index 579cf1c036a6b9202d87c440abb2e3ddeee6857a..c823af33b17db7568041619801f751f4f515caa9 100644
--- a/ui/app_list/views/search_result_tile_item_view.cc
+++ b/ui/app_list/views/search_result_tile_item_view.cc
@@ -100,8 +100,8 @@ void SearchResultTileItemView::ShowContextMenuForView(
   if (!selected())
     result_container_->ClearSelectedIndex();
 
-  context_menu_runner_.reset(new views::MenuRunner(
-      menu_model, views::MenuRunner::HAS_MNEMONICS | views::MenuRunner::ASYNC));
+  context_menu_runner_.reset(
+      new views::MenuRunner(menu_model, views::MenuRunner::HAS_MNEMONICS));
   context_menu_runner_->RunMenuAt(GetWidget(), nullptr,
                                   gfx::Rect(point, gfx::Size()),
                                   views::MENU_ANCHOR_TOPLEFT, source_type);