| Index: Source/core/page/PageLifecycleNotifier.cpp
 | 
| diff --git a/Source/core/page/PageLifecycleNotifier.cpp b/Source/core/page/PageLifecycleNotifier.cpp
 | 
| index 9d50b94f908dce42306c0e4ac3db764cddcd2e46..53bfcc6d46f73a03bbf66ba44a798fab51a09dda 100644
 | 
| --- a/Source/core/page/PageLifecycleNotifier.cpp
 | 
| +++ b/Source/core/page/PageLifecycleNotifier.cpp
 | 
| @@ -70,4 +70,10 @@ void PageLifecycleNotifier::notifyDidCommitLoad(LocalFrame* frame)
 | 
|          pageObserver->didCommitLoad(frame);
 | 
|  }
 | 
|  
 | 
| +void PageLifecycleNotifier::trace(Visitor* visitor)
 | 
| +{
 | 
| +    visitor->trace(m_pageObservers);
 | 
| +    LifecycleNotifier<Page>::trace(visitor);
 | 
| +}
 | 
| +
 | 
|  } // namespace blink
 | 
| 
 |