Another dartium fix. I swear this is the last one.

lib/dom/scripts/systemhtml.py

 #!/usr/bin/python
 # Copyright (c) 2012, 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.
 
 """This module provides shared functionality for the system to generate
 Dart:html APIs from the IDL database."""
 
 from systemfrog import *
 from systeminterface import *
@@ skipping 1376 matching lines @@
             "  EventListenerList get $NAME() => _get('$RAWNAME');\n",
             RAWNAME=event_name,
             NAME=_html_event_names[event_name])
       else:
         raise Exception('No known html even name for event: ' + event_name)
 
   def _EmitEventGetter(self, events_class):
     self._members_emitter.Emit(
         '\n'
         '  $TYPE get on() {\n'
-        '    if (_on == null) _on = new $TYPE($EVENTTARGET);\n'
+        '    if (_on == null) _on = new $TYPE(this);\n'
         '    return _on;\n'
         '  }\n',
-        TYPE=events_class,
-        EVENTTARGET='_wrappedDocumentPtr' if self._interface.id == 'Document'
-            else 'this')
+        TYPE=events_class)
 
   def _SecondaryContext(self, interface):
     if interface is not self._current_secondary_parent:
       self._current_secondary_parent = interface
       self._members_emitter.Emit('\n  // From $WHERE\n', WHERE=interface.id)
 
   # TODO(jacobr): change this to more directly match the frog version.
   def AddIndexer(self, element_type):
     """Adds all the methods required to complete implementation of List."""
     # We would like to simply inherit the implementation of everything except
@@ skipping 305 matching lines @@
     # dispatch has removed f(X), leaving only f(Y), but there is no guarantee
     # that Y = Z-X, so we need to check for Y.
     true_code = emitter.Emit(
         '$(INDENT)if ($COND) {\n'
         '$!TRUE'
         '$(INDENT)}\n',
         COND=test, INDENT=indent)
     self.GenerateDispatch(
         true_code, info, indent + '  ', position + 1, positive)
     return True