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

Source/core/html/MediaKeyEvent.h

Index: Source/core/html/MediaKeyEvent.h
diff --git a/Source/core/html/MediaKeyEvent.h b/Source/core/html/MediaKeyEvent.h
index 2394815a863523a9d1c230f5f911d3ea4e831357..07945c6c0dee88e98033b1c4dea8e832cbe8c428 100644
--- a/Source/core/html/MediaKeyEvent.h
+++ b/Source/core/html/MediaKeyEvent.h
@@ -43,7 +43,7 @@ struct MediaKeyEventInit : public EventInit {
     unsigned short systemCode;
 };
 
-class MediaKeyEvent FINAL : public Event {
+class MediaKeyEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~MediaKeyEvent();
@@ -58,7 +58,7 @@ public:
         return adoptRefWillBeNoop(new MediaKeyEvent(type, initializer));
     }
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
     String keySystem() const { return m_keySystem; }
     String sessionId() const { return m_sessionId; }
@@ -68,7 +68,7 @@ public:
     MediaKeyError* errorCode() const { return m_errorCode.get(); }
     unsigned short systemCode() const { return m_systemCode; }
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     MediaKeyEvent();