mash: Remove shelf app menu item objects.

chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc

Index: chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc
index aa55e1edc3e908dae230a293085d42673ececab9..47ab491f4db2650de393cc1ba5545d8d10aab945 100644
--- a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc
+++ b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.cc
@@ -42,9 +42,16 @@ ash::ShelfAction ArcAppDeferredLauncherItemController::ItemSelected(
 
 ash::ShelfAppMenuItemList ArcAppDeferredLauncherItemController::GetAppMenuItems(
     int event_flags) {
+  // Return an empty item list to avoid showing an application menu.
   return ash::ShelfAppMenuItemList();
 }
 
+void ArcAppDeferredLauncherItemController::ExecuteCommand(uint32_t command_id,
+                                                          int event_flags) {
+  // This delegate does not support showing an application menu.
+  NOTIMPLEMENTED();
+}
+
 void ArcAppDeferredLauncherItemController::Close() {
   if (host_)
     host_->Close(app_id());