Use the new syntax for native methods that are just renames of other native methods.

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 963 matching lines @@
       return
 
     # Do we need a native body?
     if (html_name != info.name):
       return_type = self._NarrowOutputType(info.type_name)
       
       operation_emitter = self._members_emitter.Emit('$!SCOPE',
           TYPE=return_type,
           HTML_NAME=html_name,
           NAME=info.name,
-          RETURN='' if return_type == 'void' else 'return ',
-          PARAMNAMES=info.ParametersAsArgumentList(),
           PARAMS=info.ParametersImplementationDeclaration(
               lambda type_name: self._NarrowInputType(type_name)))
 
       operation_emitter.Emit(
           '\n'
-          '  $TYPE $(HTML_NAME)($PARAMS)'
-          ' native "$(RETURN)this.$NAME($PARAMNAMES);";\n')
+          '  $TYPE $(HTML_NAME)($PARAMS) native "$NAME";\n')
     else:
       self._members_emitter.Emit(
           '\n'
           '  $TYPE $NAME($PARAMS) native;\n',
           TYPE=self._NarrowOutputType(info.type_name),
           NAME=info.name,
           PARAMS=info.ParametersImplementationDeclaration(
               lambda type_name: self._NarrowInputType(type_name)))
 
   def AddEventAttributes(self, event_attrs):
@@ skipping 713 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