Update more modules/ classes to use OVERRIDE / FINAL when needed

Source/modules/filesystem/DraggedIsolatedFileSystem.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
 #define DraggedIsolatedFileSystem_h
 
 #include "core/dom/DataObject.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class DOMFileSystem;
 
-class DraggedIsolatedFileSystem : public Supplement<DataObject> {
+class DraggedIsolatedFileSystem FINAL : public Supplement<DataObject> {
 public:
-    ~DraggedIsolatedFileSystem();
+    virtual ~DraggedIsolatedFileSystem();
 
     static PassOwnPtr<DraggedIsolatedFileSystem> create(const String& filesystemId)
     {
         return adoptPtr(new DraggedIsolatedFileSystem(filesystemId));
     }
 
     const String& filesystemId() const { return m_filesystemId; }
     DOMFileSystem* getDOMFileSystem(ExecutionContext*);
 
     static const char* supplementName();
     static DraggedIsolatedFileSystem* from(DataObject* dataObject) { return static_cast<DraggedIsolatedFileSystem*>(Supplement<DataObject>::from(dataObject, supplementName())); }
 
 private:
     DraggedIsolatedFileSystem(const String& filesystemId);
     RefPtr<DOMFileSystem> m_filesystem;
     String m_filesystemId;
 };
 
 } // namespace WebCore
 
 #endif // DraggedIsolatedFileSystem_h