Use OnceCallback on Mojo interfaces in //ash

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 <utility>
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
 #include "chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 
 ArcAppDeferredLauncherItemController::ArcAppDeferredLauncherItemController(
     const std::string& arc_app_id,
@@ skipping 10 matching lines @@
 }
 
 base::TimeDelta ArcAppDeferredLauncherItemController::GetActiveTime() const {
   return base::Time::Now() - start_time_;
 }
 
 void ArcAppDeferredLauncherItemController::ItemSelected(
     std::unique_ptr<ui::Event> event,
     int64_t display_id,
     ash::ShelfLaunchSource source,
-    const ItemSelectedCallback& callback) {
-  callback.Run(ash::SHELF_ACTION_NONE, base::nullopt);
+    ItemSelectedCallback callback) {
+  std::move(callback).Run(ash::SHELF_ACTION_NONE, base::nullopt);
 }
 
 void ArcAppDeferredLauncherItemController::ExecuteCommand(uint32_t command_id,
                                                           int32_t event_flags) {
   // This delegate does not support showing an application menu.
   NOTIMPLEMENTED();
 }
 
 void ArcAppDeferredLauncherItemController::Close() {
   if (host_)
     host_->Close(app_id());
 }