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

Source/modules/mediastream/UserMediaRequest.h

 /*
  * Copyright (C) 2011 Ericsson AB. 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
@@ skipping 53 matching lines @@
     void failPermissionDenied(const String& message);
     void failConstraint(const String& constraintName, const String& message);
     void failUASpecific(const String& name, const String& message, const String& constraintName);
 
     bool audio() const;
     bool video() const;
     WebMediaConstraints audioConstraints() const;
     WebMediaConstraints videoConstraints() const;
 
     // ContextLifecycleObserver
-    virtual void contextDestroyed() override;
+    void contextDestroyed() override;
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     UserMediaRequest(ExecutionContext*, UserMediaController*, WebMediaConstraints audio, WebMediaConstraints video, NavigatorUserMediaSuccessCallback*, NavigatorUserMediaErrorCallback*);
 
     WebMediaConstraints m_audio;
     WebMediaConstraints m_video;
 
     RawPtrWillBeMember<UserMediaController> m_controller;
 
     Member<NavigatorUserMediaSuccessCallback> m_successCallback;
     Member<NavigatorUserMediaErrorCallback> m_errorCallback;
 };
 
 } // namespace blink
 
 #endif // UserMediaRequest_h