Generate EventListener attributes of non-EventTarget classes.

client/dom/generated/src/frog/IDBTransaction.dart

 
 class IDBTransaction native "*IDBTransaction" {
 
   static final int READ_ONLY = 0;
 
   static final int READ_WRITE = 1;
 
   static final int VERSION_CHANGE = 2;
 
   IDBDatabase db;
 
   int mode;
 
+  EventListener onabort;
+
+  EventListener oncomplete;
+
+  EventListener onerror;
+
   void abort() native;
 
   void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   bool dispatchEvent(Event evt) native;
 
   IDBObjectStore objectStore(String name) native;
 
   void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
 
   var dartObjectLocalStorage;
 
   String get typeName() native;
 }