| Index: Source/core/events/MutationEvent.h | 
| diff --git a/Source/core/events/MutationEvent.h b/Source/core/events/MutationEvent.h | 
| index 7385653718e584dd14d84a131044366eaa88aa79..c86f2d1ae2117d63db53ef02861f475f3509b6bb 100644 | 
| --- a/Source/core/events/MutationEvent.h | 
| +++ b/Source/core/events/MutationEvent.h | 
| @@ -62,6 +62,8 @@ namespace WebCore { | 
|  | 
| virtual const AtomicString& interfaceName() const OVERRIDE; | 
|  | 
| +        virtual void trace(Visitor*) OVERRIDE; | 
| + | 
| private: | 
| MutationEvent(); | 
| MutationEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<Node> relatedNode, | 
|  |