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

Source/core/layout/LayoutCounter.h

 /*
  * Copyright (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 14 matching lines @@
 #include "core/layout/LayoutText.h"
 #include "core/style/CounterContent.h"
 
 namespace blink {
 
 class CounterNode;
 
 class LayoutCounter final : public LayoutText {
 public:
     LayoutCounter(Document*, const CounterContent&);
-    virtual ~LayoutCounter();
+    ~LayoutCounter() override;
 
     static void destroyCounterNodes(LayoutObject&);
     static void destroyCounterNode(LayoutObject&, const AtomicString& identifier);
     static void layoutObjectSubtreeAttached(LayoutObject*);
     static void layoutObjectSubtreeWillBeDetached(LayoutObject*);
     static void layoutObjectStyleChanged(LayoutObject&, const ComputedStyle* oldStyle, const ComputedStyle& newStyle);
 
     void updateCounter();
 
-    virtual const char* name() const override { return "LayoutCounter"; }
+    const char* name() const override { return "LayoutCounter"; }
 
 protected:
-    virtual void willBeDestroyed() override;
+    void willBeDestroyed() override;
 
 private:
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectCounter || LayoutText::isOfType(type); }
-    virtual PassRefPtr<StringImpl> originalText() const override;
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectCounter || LayoutText::isOfType(type); }
+    PassRefPtr<StringImpl> originalText() const override;
 
     // Removes the reference to the CounterNode associated with this layoutObject.
     // This is used to cause a counter display update when the CounterNode tree changes.
     void invalidate();
 
     CounterContent m_counter;
     CounterNode* m_counterNode;
     LayoutCounter* m_nextForSameCounter;
     friend class CounterNode;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutCounter, isCounter());
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showCounterLayoutTree(const blink::LayoutObject*, const char* counterName = nullptr);
 #endif
 
 #endif // LayoutCounter_h