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

Source/core/dom/shadow/ShadowRoot.h

 /*
  * Copyright (C) 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 61 matching lines @@
     ElementShadow* owner() const { return host() ? host()->shadow() : 0; }
 
     ShadowRoot* youngerShadowRoot() const { return prev(); }
 
     ShadowRoot* olderShadowRootForBindings() const;
     bool shouldExposeToBindings() const { return type() == OpenShadowRoot; }
 
     bool isYoungest() const { return !youngerShadowRoot(); }
     bool isOldest() const { return !olderShadowRoot(); }
 
-    virtual void attach(const AttachContext& = AttachContext()) override;
+    void attach(const AttachContext& = AttachContext()) override;
 
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void removedFrom(ContainerNode*) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void removedFrom(ContainerNode*) override;
 
     void registerScopedHTMLStyleChild();
     void unregisterScopedHTMLStyleChild();
 
     bool containsShadowElements() const;
     bool containsContentElements() const;
     bool containsInsertionPoints() const { return containsShadowElements() || containsContentElements(); }
     bool containsShadowRoots() const;
 
     unsigned descendantShadowElementCount() const;
@@ skipping 28 matching lines @@
 
     StyleSheetList* styleSheets();
 
     void setDelegatesFocus(bool flag) { m_delegatesFocus = flag; }
     bool delegatesFocus() const { return m_delegatesFocus; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     ShadowRoot(Document&, ShadowRootType);
-    virtual ~ShadowRoot();
+    ~ShadowRoot() override;
 
 #if !ENABLE(OILPAN)
-    virtual void dispose() override;
+    void dispose() override;
 #endif
 
-    virtual void childrenChanged(const ChildrenChange&) override;
+    void childrenChanged(const ChildrenChange&) override;
 
     ShadowRootRareData* ensureShadowRootRareData();
 
     void addChildShadowRoot();
     void removeChildShadowRoot();
     void invalidateDescendantInsertionPoints();
 
     // ShadowRoots should never be cloned.
-    virtual PassRefPtrWillBeRawPtr<Node> cloneNode(bool) override { return nullptr; }
+    PassRefPtrWillBeRawPtr<Node> cloneNode(bool) override { return nullptr; }
 
     // FIXME: This shouldn't happen. https://bugs.webkit.org/show_bug.cgi?id=88834
     bool isOrphan() const { return !host(); }
 
     RawPtrWillBeMember<ShadowRoot> m_prev;
     RawPtrWillBeMember<ShadowRoot> m_next;
     OwnPtrWillBeMember<ShadowRootRareData> m_shadowRootRareData;
     unsigned m_numberOfStyles : 27;
     unsigned m_type : 1;
     unsigned m_registeredWithParentShadowRoot : 1;
     unsigned m_descendantInsertionPointsIsValid : 1;
     unsigned m_delegatesFocus : 1;
 };
 
 inline Element* ShadowRoot::activeElement() const
 {
     return adjustedFocusedElement();
 }
 
 DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot());
 DEFINE_TYPE_CASTS(ShadowRoot, TreeScope, treeScope, treeScope->rootNode().isShadowRoot(), treeScope.rootNode().isShadowRoot());
 DEFINE_TYPE_CASTS(TreeScope, ShadowRoot, shadowRoot, true, true);
 
 } // namespace blink
 
 #endif // ShadowRoot_h