Remove many delegates, let's see what breaks

content/test/mock_platform_notification_service.cc

 // Copyright 2014 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 "content/test/mock_platform_notification_service.h"
 
 #include "base/guid.h"
 #include "base/strings/nullable_string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 148 matching lines @@
     int render_process_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return CheckPermission(origin);
 }
 
 void MockPlatformNotificationService::Close(
     const std::string& notification_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   const auto non_persistent_iter =
       non_persistent_notifications_.find(notification_id);
-  if (non_persistent_iter == non_persistent_notifications_.end()) {
-    NotificationEventDispatcher::GetInstance()->DispatchNonPersistentCloseEvent(
-        notification_id);
-    non_persistent_notifications_.erase(non_persistent_iter);
-  }
+  content::NotificationEventDispatcher::GetInstance()
+      ->DispatchNonPersistentCloseEvent(notification_id);
+  non_persistent_notifications_.erase(non_persistent_iter);
 }
 
 void MockPlatformNotificationService::ReplaceNotificationIfNeeded(
     const std::string& notification_id) {
   persistent_notifications_.erase(notification_id);
   non_persistent_notifications_.erase(notification_id);
 }
 
 blink::mojom::PermissionStatus MockPlatformNotificationService::CheckPermission(
     const GURL& origin) {
   return blink::mojom::PermissionStatus::GRANTED;
 }
 
 }  // namespace content