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

Source/modules/mediastream/MediaStreamTrack.h

Index: Source/modules/mediastream/MediaStreamTrack.h
diff --git a/Source/modules/mediastream/MediaStreamTrack.h b/Source/modules/mediastream/MediaStreamTrack.h
index 67c7d99e6b8370e923d3025c9a13fd14080a9be0..39bd65935fd53faf003001a787953ed128e40d7c 100644
--- a/Source/modules/mediastream/MediaStreamTrack.h
+++ b/Source/modules/mediastream/MediaStreamTrack.h
@@ -40,7 +40,7 @@ class ExceptionState;
 class MediaStreamComponent;
 class MediaStreamTrackSourcesCallback;
 
-class MediaStreamTrack FINAL
+class MediaStreamTrack final
     : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MediaStreamTrack>
     , public ActiveDOMObject
     , public EventTargetWithInlineData
@@ -78,21 +78,21 @@ public:
     void unregisterMediaStream(MediaStream*);
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const OVERRIDE;
-    virtual ExecutionContext* executionContext() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
+    virtual ExecutionContext* executionContext() const override;
 
     // ActiveDOMObject
-    virtual void stop() OVERRIDE;
+    virtual void stop() override;
 
     PassOwnPtr<AudioSourceProvider> createWebAudioSource();
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     MediaStreamTrack(ExecutionContext*, MediaStreamComponent*);
 
     // MediaStreamSourceObserver
-    virtual void sourceChangedState() OVERRIDE;
+    virtual void sourceChangedState() override;
 
     void propagateTrackEnded();