Eliminate TextTrackCue::updateDisplayTree()

Source/core/html/track/vtt/VTTElement.h

 /*
  * Copyright (C) 2013 Apple 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 36 matching lines @@
     static PassRefPtrWillBeRawPtr<VTTElement> create(const VTTNodeType, Document*);
     static PassRefPtrWillBeRawPtr<VTTElement> create(const QualifiedName&, Document*);
     PassRefPtrWillBeRawPtr<HTMLElement> createEquivalentHTMLElement(Document&);
 
     virtual PassRefPtrWillBeRawPtr<Element> cloneElementWithoutAttributesAndChildren() override;
 
     void setVTTNodeType(VTTNodeType type) { m_webVTTNodeType = static_cast<unsigned>(type); }
     VTTNodeType webVTTNodeType() const { return static_cast<VTTNodeType>(m_webVTTNodeType); }
 
     bool isPastNode() const { return m_isPastNode; }
-    void setIsPastNode(bool value) { m_isPastNode = value; }
+    void setIsPastNode(bool);
 
     virtual bool isVTTElement() const override { return true; }
     AtomicString language() const { return m_language; }
     void setLanguage(AtomicString value) { m_language = value; }
 
     static const QualifiedName& voiceAttributeName()
     {
         DEFINE_STATIC_LOCAL(QualifiedName, voiceAttr, (nullAtom, "voice", nullAtom));
         return voiceAttr;
     }
@@ skipping 12 matching lines @@
     unsigned m_webVTTNodeType : 4;
 
     AtomicString m_language;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(VTTElement, isVTTElement());
 
 } // namespace blink
 
 #endif // VTTElement_h