Minimize the delegate dependencies for non persistent notifications.

chrome/browser/notifications/non_persistent_notification_handler.cc

Index: chrome/browser/notifications/non_persistent_notification_handler.cc
diff --git a/chrome/browser/notifications/non_persistent_notification_handler.cc b/chrome/browser/notifications/non_persistent_notification_handler.cc
index 9a33f5360089a844572c0c027f1722defb9f2b20..091aff5635eac17a0e703028f128b7420dc00998 100644
--- a/chrome/browser/notifications/non_persistent_notification_handler.cc
+++ b/chrome/browser/notifications/non_persistent_notification_handler.cc
@@ -5,8 +5,8 @@
 #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;
@@ -16,10 +16,8 @@ void NonPersistentNotificationHandler::OnClose(
     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(
@@ -30,21 +28,14 @@ void NonPersistentNotificationHandler::OnClick(
     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.
+  // https://notifications.spec.whatwg.org/#create-a-notification
+  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);
-}