mash: Remove shelf app menu item objects.

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

 // Copyright 2016 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.
 
 #include "chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h"
 
 #include <memory>
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 24 matching lines @@
 ash::ShelfAction ArcAppDeferredLauncherItemController::ItemSelected(
     ui::EventType event_type,
     int event_flags,
     int64_t display_id,
     ash::ShelfLaunchSource source) {
   return ash::SHELF_ACTION_NONE;
 }
 
 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());
 }