Replace FINAL and OVERRIDE with their C++11 counterparts in Source/core/html

Source/core/html/track/TrackEvent.h

Index: Source/core/html/track/TrackEvent.h
diff --git a/Source/core/html/track/TrackEvent.h b/Source/core/html/track/TrackEvent.h
index 5bf2d74f63e15d19149a6676a071794400660587..84d39f9c62e86e861bdef8e98f48e00014fea3e7 100644
--- a/Source/core/html/track/TrackEvent.h
+++ b/Source/core/html/track/TrackEvent.h
@@ -37,7 +37,7 @@ struct TrackEventInit : public EventInit {
     RefPtrWillBeMember<TrackBase> track;
 };
 
-class TrackEvent FINAL : public Event {
+class TrackEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~TrackEvent();
@@ -52,11 +52,11 @@ public:
         return adoptRefWillBeNoop(new TrackEvent(type, initializer));
     }
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
     TrackBase* track() const { return m_track.get(); }
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     TrackEvent();