Fix virtual/override/final usage in Source/core/layout/.

Source/core/layout/LayoutWordBreak.h

 /*
  * Copyright (C) 2007 Apple 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 #include "core/layout/LayoutText.h"
 
 namespace blink {
 
 class HTMLElement;
 
 class LayoutWordBreak final : public LayoutText {
 public:
     explicit LayoutWordBreak(HTMLElement*);
 
-    virtual const char* name() const override { return "LayoutWordBreak"; }
-    virtual bool isWordBreak() const override;
+    const char* name() const override { return "LayoutWordBreak"; }
+    bool isWordBreak() const override;
 };
 
 }
 
 #endif