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

Source/platform/text/PlatformLocale.cpp

 /*
  * Copyright (C) 2011,2012 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 31 matching lines @@
     WTF_MAKE_NONCOPYABLE(DateTimeStringBuilder);
 public:
     // The argument objects must be alive until this object dies.
     DateTimeStringBuilder(Locale&, const DateComponents&);
 
     bool build(const String&);
     String toString();
 
 private:
     // DateTimeFormat::TokenHandler functions.
-    virtual void visitField(DateTimeFormat::FieldType, int) override final;
-    virtual void visitLiteral(const String&) override final;
+    void visitField(DateTimeFormat::FieldType, int) final;
+    void visitLiteral(const String&) final;
 
     String zeroPadString(const String&, size_t width);
     void appendNumber(int number, size_t width);
 
     StringBuilder m_builder;
     Locale& m_localizer;
     const DateComponents& m_date;
 };
 
 DateTimeStringBuilder::DateTimeStringBuilder(Locale& localizer, const DateComponents& date)
@@ skipping 375 matching lines @@
         builder.build(formatType == FormatTypeShort ? dateTimeFormatWithoutSeconds() : dateTimeFormatWithSeconds());
         break;
     case DateComponents::Invalid:
         ASSERT_NOT_REACHED();
         break;
     }
     return builder.toString();
 }
 
 } // namespace blink