Use OnceCallback on Mojo interfaces in //device/gamepad

device/gamepad/gamepad_monitor.cc

 // Copyright (c) 2011 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 "device/gamepad/gamepad_monitor.h"
 
+#include <utility>
+
 #include "base/memory/ptr_util.h"
 #include "base/memory/shared_memory.h"
 #include "device/gamepad/gamepad_service.h"
 #include "device/gamepad/gamepad_shared_buffer.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace device {
 
 GamepadMonitor::GamepadMonitor() : is_started_(false) {}
 
@@ skipping 14 matching lines @@
   if (gamepad_observer_)
     gamepad_observer_->GamepadConnected(index, gamepad);
 }
 
 void GamepadMonitor::OnGamepadDisconnected(unsigned index,
                                            const Gamepad& gamepad) {
   if (gamepad_observer_)
     gamepad_observer_->GamepadDisconnected(index, gamepad);
 }
 
-void GamepadMonitor::GamepadStartPolling(
-    const GamepadStartPollingCallback& callback) {
+void GamepadMonitor::GamepadStartPolling(GamepadStartPollingCallback callback) {
   DCHECK(!is_started_);
   is_started_ = true;
 
   GamepadService* service = GamepadService::GetInstance();
   service->ConsumerBecameActive(this);
-  callback.Run(service->GetSharedBufferHandle());
+  std::move(callback).Run(service->GetSharedBufferHandle());
 }
 
-void GamepadMonitor::GamepadStopPolling(
-    const GamepadStopPollingCallback& callback) {
+void GamepadMonitor::GamepadStopPolling(GamepadStopPollingCallback callback) {
   DCHECK(is_started_);
   is_started_ = false;
 
   GamepadService::GetInstance()->ConsumerBecameInactive(this);
-  callback.Run();
+  std::move(callback).Run();
 }
 
 void GamepadMonitor::SetObserver(mojom::GamepadObserverPtr gamepad_observer) {
   gamepad_observer_ = std::move(gamepad_observer);
 }
 
 }  // namespace device