arc: Show custom notification via notification surface

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 "ash/shell.h"
 #include "ash/system/toast/toast_manager.h"
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "ui/arc/notification/arc_notification_item.h"
+#include "ui/arc/notification/arc_notification_surface_collection.h"
 
 namespace arc {
 
 ArcNotificationManager::ArcNotificationManager(ArcBridgeService* bridge_service,
                                                const AccountId& main_profile_id)
     : ArcNotificationManager(bridge_service,
                              main_profile_id,
                              message_center::MessageCenter::Get()) {}
 
 ArcNotificationManager::ArcNotificationManager(
     ArcBridgeService* bridge_service,
     const AccountId& main_profile_id,
     message_center::MessageCenter* message_center)
     : ArcService(bridge_service),
       main_profile_id_(main_profile_id),
       message_center_(message_center),
+      notification_surface_collection_(new ArcNotificationSurfaceCollection),
       binding_(this) {
   arc_bridge_service()->AddObserver(this);
 }
 
 ArcNotificationManager::~ArcNotificationManager() {
   arc_bridge_service()->RemoveObserver(this);
 }
 
 void ArcNotificationManager::OnNotificationsInstanceReady() {
   DCHECK(!ready_);
@@ skipping 143 matching lines @@
 void ArcNotificationManager::OnToastPosted(mojom::ArcToastDataPtr data) {
   ash::Shell::GetInstance()->toast_manager()->Show(
       ash::ToastData(data->id, data->text, data->duration, data->dismiss_text));
 }
 
 void ArcNotificationManager::OnToastCancelled(mojom::ArcToastDataPtr data) {
   ash::Shell::GetInstance()->toast_manager()->Cancel(data->id);
 }
 
 }  // namespace arc