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

Source/modules/mediastream/RTCDTMFToneChangeEvent.h

Index: Source/modules/mediastream/RTCDTMFToneChangeEvent.h
diff --git a/Source/modules/mediastream/RTCDTMFToneChangeEvent.h b/Source/modules/mediastream/RTCDTMFToneChangeEvent.h
index fc1bfc4a908260bed5f1552837f4eb96ebb8ffbb..b5f32e49cb6198baaceb47bff4559fd1f7979dc2 100644
--- a/Source/modules/mediastream/RTCDTMFToneChangeEvent.h
+++ b/Source/modules/mediastream/RTCDTMFToneChangeEvent.h
@@ -35,7 +35,7 @@ struct RTCDTMFToneChangeEventInit : public EventInit {
     String tone;
 };
 
-class RTCDTMFToneChangeEvent FINAL : public Event {
+class RTCDTMFToneChangeEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~RTCDTMFToneChangeEvent();
@@ -46,9 +46,9 @@ public:
 
     const String& tone() const;
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     RTCDTMFToneChangeEvent();