Fix virtual/override/final usage in the rest of Source/core/.

Source/core/fileapi/FileReaderLoader.h

 /*
  * Copyright (C) 2010 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 51 matching lines @@
         ReadByClient
     };
 
     // If client is given, do the loading asynchronously. Otherwise, load synchronously.
     static PassOwnPtr<FileReaderLoader> create(ReadType readType, FileReaderLoaderClient* client)
     {
         return adoptPtr(new FileReaderLoader(readType, client));
     }
 
     FileReaderLoader(ReadType, FileReaderLoaderClient*);
-    virtual ~FileReaderLoader();
+    ~FileReaderLoader() override;
 
     void start(ExecutionContext*, PassRefPtr<BlobDataHandle>);
     void start(ExecutionContext*, const Stream&, unsigned readSize);
     void cancel();
 
     // ThreadableLoaderClient
-    virtual void didReceiveResponse(unsigned long, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
-    virtual void didReceiveData(const char*, unsigned) override;
-    virtual void didFinishLoading(unsigned long, double) override;
-    virtual void didFail(const ResourceError&) override;
+    void didReceiveResponse(unsigned long, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
+    void didReceiveData(const char*, unsigned) override;
+    void didFinishLoading(unsigned long, double) override;
+    void didFail(const ResourceError&) override;
 
     String stringResult();
     PassRefPtr<DOMArrayBuffer> arrayBufferResult() const;
 
     // Returns the total bytes received. Bytes ignored by m_rawData won't be
     // counted.
     //
     // This value doesn't grow more than numeric_limits<unsigned> when
     // m_readType is not set to ReadByClient.
     long long bytesLoaded() const { return m_bytesLoaded; }
@@ skipping 51 matching lines @@
     bool m_hasRange;
     unsigned m_rangeStart;
     unsigned m_rangeEnd;
 
     FileError::ErrorCode m_errorCode;
 };
 
 } // namespace blink
 
 #endif // FileReaderLoader_h