Migrated CacheRefresher events to IEventAggregator pattern.

src/Umbraco.Core/Cache/UserGroupCacheRefresher.cs

@@ -1,4 +1,5 @@
 using System;
+using Umbraco.Cms.Core.Events;
 using Umbraco.Cms.Core.Models.Membership;
 using Umbraco.Cms.Core.Persistence.Repositories;
 
@@ -10,16 +11,14 @@ namespace Umbraco.Cms.Core.Cache
     /// <remarks>
     /// This also needs to clear the user cache since IReadOnlyUserGroup's are attached to IUser objects
     /// </remarks>
-    public sealed class UserGroupCacheRefresher : CacheRefresherBase<UserGroupCacheRefresher>
+    public sealed class UserGroupCacheRefresher : CacheRefresherBase<UserGroupCacheRefresherNotification>
     {
-        public UserGroupCacheRefresher(AppCaches appCaches)
-            : base(appCaches)
+        public UserGroupCacheRefresher(AppCaches appCaches, IEventAggregator eventAggregator)
+            : base(appCaches, eventAggregator)
         { }
 
         #region Define
 
-        protected override UserGroupCacheRefresher This => this;
-
         public static readonly Guid UniqueId = Guid.Parse("45178038-B232-4FE8-AA1A-F2B949C44762");
 
         public override Guid RefresherUniqueId => UniqueId;