Fix virtual/override/final usage in Source/modules/.

Source/modules/mediastream/RTCDataChannel.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 struct WebRTCDataChannelInit;
 
 class RTCDataChannel final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<RTCDataChannel>
     , public WebRTCDataChannelHandlerClient {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(RTCDataChannel);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
     static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, WebRTCPeerConnectionHandler*, const String& label, const WebRTCDataChannelInit&, ExceptionState&);
-    virtual ~RTCDataChannel();
+    ~RTCDataChannel() override;
 
     ReadyState getHandlerState() const;
 
     String label() const;
 
     // DEPRECATED
     bool reliable() const;
 
     bool ordered() const;
     unsigned short maxRetransmitTime() const;
@@ skipping 15 matching lines @@
     void close();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(open);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
 
     void stop();
 
     // EventTarget
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     void clearWeakMembers(Visitor*);
 
     // Oilpan: need to eagerly finalize m_handler
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
 
     // WebRTCDataChannelHandlerClient
-    virtual void didChangeReadyState(WebRTCDataChannelHandlerClient::ReadyState) override;
-    virtual void didReceiveStringData(const WebString&) override;
-    virtual void didReceiveRawData(const char*, size_t) override;
-    virtual void didDetectError() override;
+    void didChangeReadyState(WebRTCDataChannelHandlerClient::ReadyState) override;
+    void didReceiveStringData(const WebString&) override;
+    void didReceiveRawData(const char*, size_t) override;
+    void didDetectError() override;
 
 private:
     RTCDataChannel(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
 
     RawPtrWillBeMember<ExecutionContext> m_executionContext;
 
     OwnPtr<WebRTCDataChannelHandler> m_handler;
@@ skipping 10 matching lines @@
 
     Timer<RTCDataChannel> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_scheduledEvents;
 
     WeakMember<RTCPeerConnection> m_connection;
 };
 
 } // namespace blink
 
 #endif // RTCDataChannel_h