Emit a close event

atom/browser/api/atom_api_notification.cc

@@ -126,6 +126,10 @@ void Notification::OnShown() {
   Emit("show");
 }
 
+void Notification::OnClosed() {
+  Emit("close");
+}
+
 void Notification::NotifyPropsUpdated() {}
 
 // Showing notifications

atom/browser/api/atom_api_notification.h

@@ -35,6 +35,7 @@ class Notification : public mate::TrackableObject<Notification>,
   void OnClicked() override;
   void OnReplied(std::string reply) override;
   void OnShown() override;
+  void OnClosed() override;
 
  protected:
   Notification(v8::Isolate* isolate,

atom/browser/ui/notification_delegate_adapter.cc

@@ -23,7 +23,9 @@ void AtomNotificationDelegateAdapter::NotificationClick() {
 void AtomNotificationDelegateAdapter::NotificationReplied(std::string reply) {
   observer_->OnReplied(reply);
 }
-void AtomNotificationDelegateAdapter::NotificationDestroyed() {}
+void AtomNotificationDelegateAdapter::NotificationDestroyed() {
+  observer_->OnClosed();
+}
 void AtomNotificationDelegateAdapter::NotificationFailed() {}
 
 }  // namespace atom

atom/browser/ui/notification_observer.h

@@ -14,6 +14,7 @@ class NotifictionObserver {
   virtual void OnClicked() {}
   virtual void OnReplied(std::string reply) {}
   virtual void OnShown() {}
+  virtual void OnClosed() {}
 
  protected:
   virtual ~NotifictionObserver() {}