Revert "Revert "Fix handling of cross-origin windows in dartium and better align general handling o…

tools/dom/scripts/systemnative.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 systems to generate
 native binding from the IDL database."""
 
 import emitter
 import logging
@@ skipping 98 matching lines @@
 
   def CustomJSMembers(self):
     return {}
 
   def _OutputConversion(self, idl_type, member):
     conversion = FindConversion(idl_type, 'get', self._interface.id, member)
     # TODO(jacobr) handle promise consistently in dart2js and dartium.
     if idl_type == 'Promise':
       return _promise_to_future
     if conversion:
-      if conversion.function_name in ('_convertNativeToDart_Window', '_convertNativeToDart_EventTarget', 'convertNativeToDart_DateTime', 'convertNativeToDart_ImageData'):
+      if conversion.function_name in ('convertNativeToDart_DateTime', 'convertNativeToDart_ImageData'):
         return None
     return conversion
 
   def _InputConversion(self, idl_type, member):
     return FindConversion(idl_type, 'set', self._interface.id, member)
 
   def GenerateCallback(self, info):
     return None
 
   def ImplementationTemplate(self):
@@ skipping 1118 matching lines @@
 
 def _IsCustom(op_or_attr):
   assert(isinstance(op_or_attr, IDLMember))
   return 'Custom' in op_or_attr.ext_attrs or 'DartCustom' in op_or_attr.ext_attrs
 
 def _IsCustomValue(op_or_attr, value):
   if _IsCustom(op_or_attr):
     return op_or_attr.ext_attrs.get('Custom') == value \
            or op_or_attr.ext_attrs.get('DartCustom') == value
   return False