| Index: Source/core/dom/MessagePort.idl
 | 
| diff --git a/Source/core/dom/MessagePort.idl b/Source/core/dom/MessagePort.idl
 | 
| index 14845beb03d4c9592529a0ff014d33f392322dfe..f834df6318afd25ddd80c9b681bf9d5f281c4ab7 100644
 | 
| --- a/Source/core/dom/MessagePort.idl
 | 
| +++ b/Source/core/dom/MessagePort.idl
 | 
| @@ -26,7 +26,8 @@
 | 
|   */
 | 
|  
 | 
|  [
 | 
| -    ActiveDOMObject
 | 
| +    ActiveDOMObject,
 | 
| +    WillBeGarbageCollected
 | 
|  ] interface MessagePort : EventTarget {
 | 
|      [Custom, RaisesException] void postMessage(any message, optional MessagePort[] messagePorts);
 | 
|  
 | 
| 
 |