FIXME: Move persistent notification id from notification database to profile

https://chromium-review.googlesource.com/c/chromium/src/+/1114840

brightray/browser/platform_notification_service.cc

@@ -121,4 +121,10 @@ void PlatformNotificationService::GetDisplayedNotifications(
     content::BrowserContext* browser_context,
     const DisplayedNotificationsCallback& callback) {}
 
+int64_t PlatformNotificationService::ReadNextPersistentNotificationId(
+    content::BrowserContext* browser_context) {
+  // Electron doesn't support persistent notifications.
+  return 0;
+}
+
 }  // namespace brightray

brightray/browser/platform_notification_service.h

@@ -43,6 +43,8 @@ class PlatformNotificationService
   void GetDisplayedNotifications(
       content::BrowserContext* browser_context,
       const DisplayedNotificationsCallback& callback) override;
+  int64_t ReadNextPersistentNotificationId(
+      content::BrowserContext* browser_context) override;
 
  private:
   BrowserClient* browser_client_;