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

Source/core/dom/PseudoElement.h

Index: Source/core/dom/PseudoElement.h
diff --git a/Source/core/dom/PseudoElement.h b/Source/core/dom/PseudoElement.h
index 270d8b1378b18eeef5c4199dce831b718067b0f8..e4c62dca17d912a580b209eff13e3a008cc4195b 100644
--- a/Source/core/dom/PseudoElement.h
+++ b/Source/core/dom/PseudoElement.h
@@ -37,13 +37,13 @@ class CORE_EXPORT PseudoElement : public Element {
 public:
     static PassRefPtrWillBeRawPtr<PseudoElement> create(Element* parent, PseudoId);
 
-    virtual PassRefPtr<ComputedStyle> customStyleForLayoutObject() override;
-    virtual void attach(const AttachContext& = AttachContext()) override;
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    PassRefPtr<ComputedStyle> customStyleForLayoutObject() override;
+    void attach(const AttachContext& = AttachContext()) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
 
-    virtual bool canStartSelection() const override { return false; }
-    virtual bool canContainRangeEndPoint() const override { return false; }
-    virtual PseudoId pseudoId() const override { return m_pseudoId; }
+    bool canStartSelection() const override { return false; }
+    bool canContainRangeEndPoint() const override { return false; }
+    PseudoId pseudoId() const override { return m_pseudoId; }
 
     static String pseudoElementNameForEvents(PseudoId);
 
@@ -55,7 +55,7 @@ protected:
     PseudoElement(Element*, PseudoId);
 
 private:
-    virtual void didRecalcStyle(StyleRecalcChange) override;
+    void didRecalcStyle(StyleRecalcChange) override;
 
     PseudoId m_pseudoId;
 };