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

Source/core/events/PopStateEvent.h

Index: Source/core/events/PopStateEvent.h
diff --git a/Source/core/events/PopStateEvent.h b/Source/core/events/PopStateEvent.h
index 75c235175e70289d966d696bc1bc956634098cd5..fd29d4505701603471a2dfa2b56fb606506e275d 100644
--- a/Source/core/events/PopStateEvent.h
+++ b/Source/core/events/PopStateEvent.h
@@ -37,7 +37,7 @@ class SerializedScriptValue;
 
 typedef EventInit PopStateEventInit;
 
-class PopStateEvent FINAL : public Event {
+class PopStateEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~PopStateEvent();
@@ -53,9 +53,9 @@ public:
     }
     History* history() const { return m_history.get(); }
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     PopStateEvent();