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

Source/core/html/track/InbandTextTrack.h

Index: Source/core/html/track/InbandTextTrack.h
diff --git a/Source/core/html/track/InbandTextTrack.h b/Source/core/html/track/InbandTextTrack.h
index 020d6cadaea053f8c5139ac092deb73a24a15b2c..b38094bd4e8940a9c11c7cd3992cb44da9bbf948 100644
--- a/Source/core/html/track/InbandTextTrack.h
+++ b/Source/core/html/track/InbandTextTrack.h
@@ -41,14 +41,14 @@ namespace blink {
 class InbandTextTrack final : public TextTrack, public WebInbandTextTrackClient {
 public:
     static PassRefPtrWillBeRawPtr<InbandTextTrack> create(WebInbandTextTrack*);
-    virtual ~InbandTextTrack();
+    ~InbandTextTrack() override;
 
-    virtual void setTrackList(TextTrackList*) override;
+    void setTrackList(TextTrackList*) override;
 
 private:
     InbandTextTrack(WebInbandTextTrack*);
 
-    virtual void addWebVTTCue(double, double, const WebString&, const WebString&, const WebString&) override;
+    void addWebVTTCue(double, double, const WebString&, const WebString&, const WebString&) override;
 
     WebInbandTextTrack* m_webTrack;
 };