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

Source/core/events/OverflowEvent.h

Index: Source/core/events/OverflowEvent.h
diff --git a/Source/core/events/OverflowEvent.h b/Source/core/events/OverflowEvent.h
index 25582658b66dd3b9ac0c441828be36850886a6a6..aaaaec253b25ded65f6eaac79274449a542d685a 100644
--- a/Source/core/events/OverflowEvent.h
+++ b/Source/core/events/OverflowEvent.h
@@ -38,7 +38,7 @@ struct OverflowEventInit : public EventInit {
     bool verticalOverflow;
 };
 
-class OverflowEvent FINAL : public Event {
+class OverflowEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     enum orientType {
@@ -64,9 +64,9 @@ public:
     bool horizontalOverflow() const { return m_horizontalOverflow; }
     bool verticalOverflow() const { return m_verticalOverflow; }
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     OverflowEvent();