| Index: Source/WebCore/dom/MutationObserver.idl | 
| diff --git a/Source/WebCore/dom/MutationObserver.idl b/Source/WebCore/dom/MutationObserver.idl | 
| index 29aa06e7f1f71f6abd27feca3f0a8af36e3d6cdb..5302606b52114d7ee2cb7e09236ed28b9491eae0 100644 | 
| --- a/Source/WebCore/dom/MutationObserver.idl | 
| +++ b/Source/WebCore/dom/MutationObserver.idl | 
| @@ -30,6 +30,7 @@ | 
|  | 
| [ | 
| CustomConstructor, | 
| +    ConstructorParameters=1, | 
| ImplementationLacksVTable | 
| ] interface MutationObserver { | 
| [RaisesException] void observe(Node target, Dictionary options); | 
|  |