Make use of CreateInterfacePtrAndBind() where appropriate

ui/arc/notification/arc_notification_manager.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 "ui/arc/notification/arc_notification_manager.h"
 
 #include "base/stl_util.h"
 #include "ui/arc/notification/arc_notification_item.h"
 
 namespace arc {
@@ skipping 11 matching lines @@
 }
 
 void ArcNotificationManager::OnNotificationsInstanceReady() {
   NotificationsInstance* notifications_instance =
       arc_bridge_service()->notifications_instance();
   if (!notifications_instance) {
     VLOG(2) << "Request to refresh app list when bridge service is not ready.";
     return;
   }
 
-  NotificationsHostPtr host;
-  binding_.Bind(mojo::GetProxy(&host));
-  notifications_instance->Init(std::move(host));
+  notifications_instance->Init(binding_.CreateInterfacePtrAndBind());
 }
 
 void ArcNotificationManager::OnNotificationPosted(ArcNotificationDataPtr data) {
   ArcNotificationItem* item = items_.get(data->key);
   if (!item) {
     // Show a notification on the primary loged-in user's desktop.
     // TODO(yoshiki): Reconsider when ARC supports multi-user.
     item = new ArcNotificationItem(this, message_center::MessageCenter::Get(),
                                    data->key, main_profile_id_);
     items_.set(data->key, make_scoped_ptr(item));
@@ skipping 36 matching lines @@
             << key << "), but it is gone.";
     return;
   }
 
   arc_bridge_service()
       ->notifications_instance()
       ->SendNotificationEventToAndroid(key, ArcNotificationEvent::BODY_CLICKED);
 }
 
 }  // namespace arc