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

Source/modules/mediastream/MediaStreamEvent.h

Index: Source/modules/mediastream/MediaStreamEvent.h
diff --git a/Source/modules/mediastream/MediaStreamEvent.h b/Source/modules/mediastream/MediaStreamEvent.h
index 53b04704a42cd2c20ecb81d4ef038781db7a21b5..0b4a984cae1f9d9808b850ca07bf72f51cb67207 100644
--- a/Source/modules/mediastream/MediaStreamEvent.h
+++ b/Source/modules/mediastream/MediaStreamEvent.h
@@ -37,7 +37,7 @@ struct MediaStreamEventInit : public EventInit {
     Member<MediaStream> stream;
 };
 
-class MediaStreamEvent FINAL : public Event {
+class MediaStreamEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~MediaStreamEvent();
@@ -49,9 +49,9 @@ public:
     MediaStream* stream() const;
     MediaStream* stream(bool&) const;
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     MediaStreamEvent();