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

Source/core/html/shadow/MeterShadowElement.h

Index: Source/core/html/shadow/MeterShadowElement.h
diff --git a/Source/core/html/shadow/MeterShadowElement.h b/Source/core/html/shadow/MeterShadowElement.h
index 71d03be9f4e096d8c99c99587896c5b0748a941f..198f2e72398cfb7696bda284cc418522cad5d360 100644
--- a/Source/core/html/shadow/MeterShadowElement.h
+++ b/Source/core/html/shadow/MeterShadowElement.h
@@ -44,7 +44,7 @@ protected:
     HTMLMeterElement* meterElement() const;
 
 private:
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
 };
 
 class MeterInnerElement final : public MeterShadowElement {
@@ -53,8 +53,8 @@ public:
 
 private:
     explicit MeterInnerElement(Document&);
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 };
 
 class MeterBarElement final : public MeterShadowElement {