Remove support for attribute event listeners.

client/dom/generated/src/interface/DOMApplicationCache.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 interface ApplicationCache extends EventTarget {
 
-  EventListener get oncached();
-
-  void set oncached(EventListener value);
-
-  EventListener get onchecking();
-
-  void set onchecking(EventListener value);
-
-  EventListener get ondownloading();
-
-  void set ondownloading(EventListener value);
-
-  EventListener get onerror();
-
-  void set onerror(EventListener value);
-
-  EventListener get onnoupdate();
-
-  void set onnoupdate(EventListener value);
-
-  EventListener get onobsolete();
-
-  void set onobsolete(EventListener value);
-
-  EventListener get onprogress();
-
-  void set onprogress(EventListener value);
-
-  EventListener get onupdateready();
-
-  void set onupdateready(EventListener value);
-
   int get status();
 
   void addEventListener(String type, EventListener listener, [bool useCapture]);
 
   bool dispatchEvent(Event evt);
 
   void removeEventListener(String type, EventListener listener, [bool useCapture]);
 
   void swapCache();
 
   void update();
 }
 
 interface DOMApplicationCache extends ApplicationCache {
 
   static final int CHECKING = 2;
 
   static final int DOWNLOADING = 3;
 
   static final int IDLE = 1;
 
   static final int OBSOLETE = 5;
 
   static final int UNCACHED = 0;
 
   static final int UPDATEREADY = 4;
 }