| Index: core/dom/MutationObserver.idl | 
| diff --git a/core/dom/MutationObserver.idl b/core/dom/MutationObserver.idl | 
| index 2c6d142f8f824188e555f0ed8a8f9a19104f98bb..e024d4af4f017d3d3e2d2dea0feaf7663b3bf327 100644 | 
| --- a/core/dom/MutationObserver.idl | 
| +++ b/core/dom/MutationObserver.idl | 
| @@ -33,7 +33,7 @@ | 
| Custom=VisitDOMWrapper, | 
| WillBeGarbageCollected, | 
| ] interface MutationObserver { | 
| -    [RaisesException] void observe(Node target, Dictionary options); | 
| +    [RaisesException] void observe(Node target, MutationObserverInit options); | 
| sequence<MutationRecord> takeRecords(); | 
| void disconnect(); | 
| }; | 
|  |