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

Source/platform/weborigin/KURL.cpp

 /*
  * Copyright (C) 2004, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2008, 2009, 2011 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.
@@ skipping 83 matching lines @@
 namespace {
 
 class KURLCharsetConverter final : public url::CharsetConverter {
 public:
     // The encoding parameter may be 0, but in this case the object must not be called.
     explicit KURLCharsetConverter(const WTF::TextEncoding* encoding)
         : m_encoding(encoding)
     {
     }
 
-    virtual void ConvertFromUTF16(const url::UTF16Char* input, int inputLength, url::CanonOutput* output) override
+    void ConvertFromUTF16(const url::UTF16Char* input, int inputLength, url::CanonOutput* output) override
     {
         CString encoded = m_encoding->normalizeAndEncode(String(input, inputLength), WTF::URLEncodedEntitiesForUnencodables);
         output->Append(encoded.data(), static_cast<int>(encoded.length()));
     }
 
 private:
     const WTF::TextEncoding* m_encoding;
 };
 
 } // namespace
@@ skipping 788 matching lines @@
     m_string = AtomicString::fromUTF8(output.data(), output.length());
 }
 
 bool KURL::isSafeToSendToAnotherThread() const
 {
     return m_string.isSafeToSendToAnotherThread()
         && (!m_innerURL || m_innerURL->isSafeToSendToAnotherThread());
 }
 
 } // namespace blink