Roll WebCore IDL to multivm@418

third_party/WebCore/Modules/filesystem/FileWriter.idl

 /*
  * Copyright (C) 2010 Google Inc.  All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 42 matching lines @@
         readonly attribute FileError error;
         readonly attribute long long position;
         readonly attribute long long length;
 
                  attribute EventListener onwritestart;
                  attribute EventListener onprogress;
                  attribute EventListener onwrite;
                  attribute EventListener onabort;
                  attribute EventListener onerror;
                  attribute EventListener onwriteend;
+
+        // EventTarget interface
+        void addEventListener(in DOMString type,
+                              in EventListener listener,
+                              in [Optional] boolean useCapture);
+        void removeEventListener(in DOMString type,
+                                 in EventListener listener,
+                                 in [Optional] boolean useCapture);
+        boolean dispatchEvent(in Event evt)
+            raises(EventException);
     };
 }