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

Source/core/editing/InsertListCommand.h

Index: Source/core/editing/InsertListCommand.h
diff --git a/Source/core/editing/InsertListCommand.h b/Source/core/editing/InsertListCommand.h
index dfa6ff99d0306861039063e38c7c4aa2a2cbcca1..8c03016e8b24a691e9b5f840eae7c87e08df0964 100644
--- a/Source/core/editing/InsertListCommand.h
+++ b/Source/core/editing/InsertListCommand.h
@@ -42,15 +42,15 @@ public:
         return adoptRefWillBeNoop(new InsertListCommand(document, listType));
     }
 
-    virtual bool preservesTypingStyle() const override { return true; }
+    bool preservesTypingStyle() const override { return true; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     InsertListCommand(Document&, Type);
 
-    virtual void doApply() override;
-    virtual EditAction editingAction() const override { return EditActionInsertList; }
+    void doApply() override;
+    EditAction editingAction() const override { return EditActionInsertList; }
 
     HTMLUListElement* fixOrphanedListChild(Node*);
     bool selectionHasListOfType(const VisibleSelection&, const HTMLQualifiedName&);