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

Source/core/editing/InsertNodeBeforeCommand.h

Index: Source/core/editing/InsertNodeBeforeCommand.h
diff --git a/Source/core/editing/InsertNodeBeforeCommand.h b/Source/core/editing/InsertNodeBeforeCommand.h
index 7538af98b4463e5ead36265976e3a7a54c112dc0..b6c97838e9b134794d86e461164b26d923a352ab 100644
--- a/Source/core/editing/InsertNodeBeforeCommand.h
+++ b/Source/core/editing/InsertNodeBeforeCommand.h
@@ -43,8 +43,8 @@ public:
 private:
     InsertNodeBeforeCommand(PassRefPtrWillBeRawPtr<Node> childToInsert, PassRefPtrWillBeRawPtr<Node> childToInsertBefore, ShouldAssumeContentIsAlwaysEditable);
 
-    virtual void doApply() override;
-    virtual void doUnapply() override;
+    void doApply() override;
+    void doUnapply() override;
 
     RefPtrWillBeMember<Node> m_insertChild;
     RefPtrWillBeMember<Node> m_refChild;