Fix virtual/override/final usage in Source/modules/.

Source/modules/mediastream/MediaStreamTrack.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Ericsson AB. 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 32 matching lines @@
 
 class MODULES_EXPORT MediaStreamTrack final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<MediaStreamTrack>
     , public ActiveDOMObject
     , public MediaStreamSource::Observer {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(MediaStreamTrack);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaStreamTrack);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static MediaStreamTrack* create(ExecutionContext*, MediaStreamComponent*);
-    virtual ~MediaStreamTrack();
+    ~MediaStreamTrack() override;
 
     String kind() const;
     String id() const;
     String label() const;
     bool remote() const;
     bool readonly() const;
 
     bool enabled() const;
     void setEnabled(bool);
 
     bool muted() const;
 
     String readyState() const;
 
     static void getSources(ExecutionContext*, MediaStreamTrackSourcesCallback*, ExceptionState&);
     void stopTrack(ExceptionState&);
     MediaStreamTrack* clone(ExecutionContext*);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(mute);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(unmute);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(ended);
 
     MediaStreamComponent* component();
     bool ended() const;
 
     void registerMediaStream(MediaStream*);
     void unregisterMediaStream(MediaStream*);
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     // ActiveDOMObject
-    virtual void stop() override;
+    void stop() override;
 
     PassOwnPtr<AudioSourceProvider> createWebAudioSource();
 
     // Oilpan: need to eagerly unregister as observer.
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
 private:
     MediaStreamTrack(ExecutionContext*, MediaStreamComponent*);
 
     // MediaStreamSourceObserver
-    virtual void sourceChangedState() override;
+    void sourceChangedState() override;
 
     void propagateTrackEnded();
 
     MediaStreamSource::ReadyState m_readyState;
     HeapHashSet<Member<MediaStream>> m_registeredMediaStreams;
     bool m_isIteratingRegisteredMediaStreams;
     bool m_stopped;
     RefPtr<MediaStreamComponent> m_component;
 };
 
 typedef HeapVector<Member<MediaStreamTrack>> MediaStreamTrackVector;
 
 } // namespace blink
 
 #endif // MediaStreamTrack_h