Fix virtual/override/final usage in Source/core/html/.

Source/core/html/track/TextTrack.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011, 2012, 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
@@ skipping 36 matching lines @@
 
 class CORE_EXPORT TextTrack : public EventTargetWithInlineData, public TrackBase {
     DEFINE_WRAPPERTYPEINFO();
     REFCOUNTED_EVENT_TARGET(TrackBase);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TextTrack);
 public:
     static PassRefPtrWillBeRawPtr<TextTrack> create(const AtomicString& kind, const AtomicString& label, const AtomicString& language)
     {
         return adoptRefWillBeNoop(new TextTrack(kind, label, language, emptyAtom, AddTrack));
     }
-    virtual ~TextTrack();
+    ~TextTrack() override;
 
     virtual void setTrackList(TextTrackList*);
     TextTrackList* trackList() { return m_trackList; }
 
-    virtual void setKind(const AtomicString&) override;
+    void setKind(const AtomicString&) override;
 
     static const AtomicString& subtitlesKeyword();
     static const AtomicString& captionsKeyword();
     static const AtomicString& descriptionsKeyword();
     static const AtomicString& chaptersKeyword();
     static const AtomicString& metadataKeyword();
     static bool isValidKindKeyword(const String&);
 
     static const AtomicString& disabledKeyword();
     static const AtomicString& hiddenKeyword();
@@ skipping 34 matching lines @@
     int trackIndexRelativeToRenderedTracks();
 
     bool hasBeenConfigured() const { return m_hasBeenConfigured; }
     void setHasBeenConfigured(bool flag) { m_hasBeenConfigured = flag; }
 
     virtual bool isDefault() const { return false; }
 
     void removeAllCues();
 
     // EventTarget methods
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     TextTrack(const AtomicString& kind, const AtomicString& label, const AtomicString& language, const AtomicString& id, TextTrackType);
 
-    virtual bool isValidKind(const AtomicString& kind) const override { return isValidKindKeyword(kind); }
-    virtual AtomicString defaultKind() const override { return subtitlesKeyword(); }
+    bool isValidKind(const AtomicString& kind) const override { return isValidKindKeyword(kind); }
+    AtomicString defaultKind() const override { return subtitlesKeyword(); }
 
     void addListOfCues(WillBeHeapVector<RefPtrWillBeMember<TextTrackCue>>&);
 
 private:
     CueTimeline* cueTimeline() const;
 
     TextTrackCueList* ensureTextTrackCueList();
     RefPtrWillBeMember<TextTrackCueList> m_cues;
     RefPtrWillBeMember<TextTrackCueList> m_activeCues;
 
     VTTRegionList* ensureVTTRegionList();
     RefPtrWillBeMember<VTTRegionList> m_regions;
 
     RawPtrWillBeMember<TextTrackList> m_trackList;
     AtomicString m_mode;
     TextTrackType m_trackType;
     ReadinessState m_readinessState;
     int m_trackIndex;
     int m_renderedTrackIndex;
     bool m_hasBeenConfigured;
 };
 
 DEFINE_TRACK_TYPE_CASTS(TextTrack, TrackBase::TextTrack);
 
 } // namespace blink
 
 #endif // TextTrack_h