InlinedVisitor: Migrate html to use inlined tracing

Source/core/html/HTMLTrackElement.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 38 matching lines @@
 
     TextTrack* track();
 
     void scheduleLoad();
 
     enum LoadStatus { Failure, Success };
     void didCompleteLoad(LoadStatus);
 
     const AtomicString& mediaElementCrossOriginAttribute() const;
 
-    virtual void trace(Visitor*) override;
+    DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit HTMLTrackElement(Document&);
     virtual ~HTMLTrackElement();
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
 
     virtual void removedFrom(ContainerNode*) override;
     virtual bool isURLAttribute(const Attribute&) const override;
 
     void loadTimerFired(Timer<HTMLTrackElement>*);
 
     HTMLMediaElement* mediaElement() const;
 
     LoadableTextTrack* ensureTrack();
     bool canLoadUrl(const KURL&);
 
     RefPtrWillBeMember<LoadableTextTrack> m_track;
     Timer<HTMLTrackElement> m_loadTimer;
 };
 
 } // namespace blink
 
 #endif // HTMLTrackElement_h