| Index: tools/dom/scripts/systemnative.py | 
| diff --git a/tools/dom/scripts/systemnative.py b/tools/dom/scripts/systemnative.py | 
| index 6d0c94d78c9b500bb71e80ea76f63fa9eb147607..1f5a030fc6a581a4e7d0be8b5653a33e8b038bf0 100644 | 
| --- a/tools/dom/scripts/systemnative.py | 
| +++ b/tools/dom/scripts/systemnative.py | 
| @@ -116,7 +116,7 @@ class DartiumBackend(HtmlDartGenerator): | 
| 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 | 
|  | 
|  |