Move handler processing to NotificationDisplayService.

chrome/browser/notifications/stub_notification_display_service.cc

 // Copyright 2017 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/notifications/stub_notification_display_service.h"
 
 #include <algorithm>
 
 #include "base/memory/ptr_util.h"
+#include "chrome/browser/profiles/profile.h"
 
 // static
 std::unique_ptr<KeyedService> StubNotificationDisplayService::FactoryForTests(
-    content::BrowserContext* /* browser_context */) {
-  return base::MakeUnique<StubNotificationDisplayService>();
+    content::BrowserContext* context) {
+  return base::MakeUnique<StubNotificationDisplayService>(
+      Profile::FromBrowserContext(context));
 }
 
-StubNotificationDisplayService::StubNotificationDisplayService() = default;
+StubNotificationDisplayService::StubNotificationDisplayService(Profile* profile)
+    : NotificationDisplayService(profile) {}
 
 StubNotificationDisplayService::~StubNotificationDisplayService() = default;
 
 void StubNotificationDisplayService::RemoveNotification(
     NotificationCommon::Type notification_type,
     const std::string& notification_id,
     bool by_user) {
   auto iter = std::find_if(
       notifications_.begin(), notifications_.end(),
       [notification_type, notification_id](const NotificationData& data) {
@@ skipping 52 matching lines @@
 void StubNotificationDisplayService::GetDisplayed(
     const DisplayedNotificationsCallback& callback) {
   std::unique_ptr<std::set<std::string>> notifications =
       base::MakeUnique<std::set<std::string>>();
 
   for (const auto& notification_data : notifications_)
     notifications->insert(notification_data.second.delegate_id());
 
   callback.Run(std::move(notifications), true /* supports_synchronization */);
 }