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

Source/modules/mediastream/RTCDataChannelEvent.h

Index: Source/modules/mediastream/RTCDataChannelEvent.h
diff --git a/Source/modules/mediastream/RTCDataChannelEvent.h b/Source/modules/mediastream/RTCDataChannelEvent.h
index dcb87ad1cabfad84c21c927ec94edba0c47a64d3..76c2458da3db50226e32f6e77f149b0268cb5825 100644
--- a/Source/modules/mediastream/RTCDataChannelEvent.h
+++ b/Source/modules/mediastream/RTCDataChannelEvent.h
@@ -31,7 +31,7 @@
 
 namespace blink {
 
-class RTCDataChannelEvent FINAL : public Event {
+class RTCDataChannelEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
     virtual ~RTCDataChannelEvent();
@@ -41,9 +41,9 @@ public:
 
     RTCDataChannel* channel() const;
 
-    virtual const AtomicString& interfaceName() const OVERRIDE;
+    virtual const AtomicString& interfaceName() const override;
 
-    virtual void trace(Visitor*) OVERRIDE;
+    virtual void trace(Visitor*) override;
 
 private:
     RTCDataChannelEvent();