| Index: Source/modules/presentation/DefaultSessionStartEvent.idl | 
| diff --git a/Source/modules/presentation/DefaultSessionStartEvent.idl b/Source/modules/presentation/DefaultSessionStartEvent.idl | 
| index 39bbd29dd334304c919907501313cd6c415dfd5b..70bdf7ea2d83f04dbf3ad4ce00c2bea212d0a24b 100644 | 
| --- a/Source/modules/presentation/DefaultSessionStartEvent.idl | 
| +++ b/Source/modules/presentation/DefaultSessionStartEvent.idl | 
| @@ -8,5 +8,5 @@ | 
| Constructor(DOMString type, optional DefaultSessionStartEventInit eventInitDict), | 
| RuntimeEnabled=Presentation | 
| ] interface DefaultSessionStartEvent : Event { | 
| -    readonly attribute PresentationSession session; | 
| +    [SameObject] readonly attribute PresentationSession session; | 
| }; | 
|  |