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

Source/core/dom/ContainerNode.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2013 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.
@@ skipping 52 matching lines @@
 };
 
 // This constant controls how much buffer is initially allocated
 // for a Node Vector that is used to store child Nodes of a given Node.
 // FIXME: Optimize the value.
 const int initialNodeVectorSize = 11;
 using NodeVector = WillBeHeapVector<RefPtrWillBeMember<Node>, initialNodeVectorSize>;
 
 class CORE_EXPORT ContainerNode : public Node {
 public:
-    virtual ~ContainerNode();
+    ~ContainerNode() override;
 
     Node* firstChild() const { return m_firstChild; }
     Node* lastChild() const { return m_lastChild; }
     bool hasChildren() const { return m_firstChild; }
 
     bool hasOneChild() const { return m_firstChild && !m_firstChild->nextSibling(); }
     bool hasOneTextChild() const { return hasOneChild() && m_firstChild->isTextNode(); }
     bool hasChildCount(unsigned) const;
 
     PassRefPtrWillBeRawPtr<HTMLCollection> children();
@@ skipping 19 matching lines @@
     // They don't send DOM mutation events or accept DocumentFragments.
     void parserAppendChild(PassRefPtrWillBeRawPtr<Node>);
     void parserRemoveChild(Node&);
     void parserInsertBefore(PassRefPtrWillBeRawPtr<Node> newChild, Node& refChild);
     void parserTakeAllChildrenFrom(ContainerNode&);
 
     void removeChildren(SubtreeModificationAction = DispatchSubtreeModifiedEvent);
 
     void cloneChildNodes(ContainerNode* clone);
 
-    virtual void attach(const AttachContext& = AttachContext()) override;
-    virtual void detach(const AttachContext& = AttachContext()) override;
-    virtual LayoutRect boundingBox() const override final;
-    virtual void setFocus(bool) override;
+    void attach(const AttachContext& = AttachContext()) override;
+    void detach(const AttachContext& = AttachContext()) override;
+    LayoutRect boundingBox() const final;
+    void setFocus(bool) override;
     void focusStateChanged();
-    virtual void setActive(bool = true) override;
-    virtual void setHovered(bool = true) override;
+    void setActive(bool = true) override;
+    void setHovered(bool = true) override;
 
     bool childrenOrSiblingsAffectedByFocus() const { return hasRestyleFlag(ChildrenOrSiblingsAffectedByFocus); }
     void setChildrenOrSiblingsAffectedByFocus() { setRestyleFlag(ChildrenOrSiblingsAffectedByFocus); }
 
     bool childrenOrSiblingsAffectedByHover() const { return hasRestyleFlag(ChildrenOrSiblingsAffectedByHover); }
     void setChildrenOrSiblingsAffectedByHover() { setRestyleFlag(ChildrenOrSiblingsAffectedByHover); }
 
     bool childrenOrSiblingsAffectedByActive() const { return hasRestyleFlag(ChildrenOrSiblingsAffectedByActive); }
     void setChildrenOrSiblingsAffectedByActive() { setRestyleFlag(ChildrenOrSiblingsAffectedByActive); }
 
@@ skipping 237 matching lines @@
 inline void getChildNodes(ContainerNode& node, NodeVector& nodes)
 {
     ASSERT(!nodes.size());
     for (Node* child = node.firstChild(); child; child = child->nextSibling())
         nodes.append(child);
 }
 
 } // namespace blink
 
 #endif // ContainerNode_h