| Index: Source/core/html/track/VideoTrack.h | 
| diff --git a/Source/core/html/track/VideoTrack.h b/Source/core/html/track/VideoTrack.h | 
| index 678a17ebbfca004443a7e838b2a9b4b54c611da6..4e607fd73fde2b43701834d8d0f8ed03aa8cd5f0 100644 | 
| --- a/Source/core/html/track/VideoTrack.h | 
| +++ b/Source/core/html/track/VideoTrack.h | 
| @@ -34,11 +34,14 @@ public: | 
| static const AtomicString& subtitlesKeyword(); | 
| static const AtomicString& commentaryKeyword(); | 
|  | 
| +    static bool isValidKindKeyword(const AtomicString&); | 
| +    static bool isValidKindKeyword(const String&); | 
| + | 
| private: | 
| VideoTrack(const String& id, const AtomicString& kind, const AtomicString& label, const AtomicString& language, bool selected); | 
|  | 
| // TrackBase | 
| -    virtual bool isValidKind(const AtomicString&) const override; | 
| +    virtual bool isValidKind(const AtomicString& kind) const override { return isValidKindKeyword(kind); } | 
| virtual AtomicString defaultKind() const override; | 
|  | 
| bool m_selected; | 
|  |