| Index: third_party/WebKit/Source/core/html/track/TrackBase.cpp
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| diff --git a/third_party/WebKit/Source/core/html/track/TrackBase.cpp b/third_party/WebKit/Source/core/html/track/TrackBase.cpp
 | 
| index 735987db437c2d6fbc73514c995ce0be5d98c11e..d4eb750efafcab737af4fc5b8b275e1aa9876404 100644
 | 
| --- a/third_party/WebKit/Source/core/html/track/TrackBase.cpp
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| +++ b/third_party/WebKit/Source/core/html/track/TrackBase.cpp
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| @@ -64,6 +64,7 @@ Node* TrackBase::owner() const
 | 
|  
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|  DEFINE_TRACE(TrackBase)
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|  {
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| +    Supplementable<TrackBase>::trace(visitor);
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|      visitor->trace(m_mediaElement);
 | 
|  }
 | 
|  
 | 
| 
 |