Minimize the delegate dependencies for non persistent notifications.

chrome/browser/notifications/non_persistent_notification_handler.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 "chrome/browser/notifications/non_persistent_notification_handler.h"
 
 #include "base/strings/nullable_string16.h"
-#include "chrome/browser/notifications/notification_delegate.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
+#include "content/public/browser/notification_event_dispatcher.h"
 
 NonPersistentNotificationHandler::NonPersistentNotificationHandler() = default;
 NonPersistentNotificationHandler::~NonPersistentNotificationHandler() = default;
 
 void NonPersistentNotificationHandler::OnClose(
     Profile* profile,
     const std::string& origin,
     const std::string& notification_id,
     bool by_user) {
-  if (notifications_.find(notification_id) != notifications_.end()) {
-    notifications_[notification_id]->Close(by_user);
-    notifications_.erase(notification_id);
-  }
+  content::NotificationEventDispatcher::GetInstance()
+      ->DispatchNonPersistentCloseEvent(notification_id);
 }
 
 void NonPersistentNotificationHandler::OnClick(

[Peter Beverloo, 2017/05/31 17:52:42]

Should OnShow() be added to the handlers?

[Miguel Garcia, 2017/06/01 17:00:53]

Not sure I get this, what would OnShow do?

[Peter Beverloo, 2017/06/01 17:56:27]

You're now special casing non-persistent notifications in
native_notification_display_service.cc so that we can dispatch the Show event.
That's a hack - we should just fire NotificationHandler::OnShow() and only
provide an implementation for the non-persistent notification handler.

     Profile* profile,
     const std::string& origin,
     const std::string& notification_id,
     int action_index,
     const base::NullableString16& reply) {
   DCHECK(reply.is_null());
 
-  if (notifications_.find(notification_id) != notifications_.end()) {
-    if (action_index >= 0)
-      notifications_[notification_id]->ButtonClick(action_index);
-    else
-      notifications_[notification_id]->Click();
-  }
+  // Non persistent notifications don't allow buttons.

[Peter Beverloo, 2017/05/31 17:52:42]

nit: refer to https://notifications.spec.whatwg.org/#create-a-notification

[Miguel Garcia, 2017/06/01 17:00:53]

Done.

+  DCHECK_EQ(-1, action_index);
+
+  content::NotificationEventDispatcher::GetInstance()
+      ->DispatchNonPersistentClickEvent(notification_id);
 }
 
 void NonPersistentNotificationHandler::OpenSettings(Profile* profile) {
   NotificationCommon::OpenNotificationSettings(profile);
 }
-
-void NonPersistentNotificationHandler::RegisterNotification(
-    const std::string& notification_id,
-    NotificationDelegate* delegate) {
-  notifications_[notification_id] =
-      scoped_refptr<NotificationDelegate>(delegate);
-}