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

Source/core/html/shadow/ProgressShadowElement.h

Index: Source/core/html/shadow/ProgressShadowElement.h
diff --git a/Source/core/html/shadow/ProgressShadowElement.h b/Source/core/html/shadow/ProgressShadowElement.h
index 70bbf4e97cd9e326b26cf1c5ac5fd74c2fb7f327..6600a51deec5bbe337e8852cd5ae25b608d2ceca 100644
--- a/Source/core/html/shadow/ProgressShadowElement.h
+++ b/Source/core/html/shadow/ProgressShadowElement.h
@@ -45,7 +45,7 @@ public:
     HTMLProgressElement* progressElement() const;
 
 protected:
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
 };
 
 class ProgressInnerElement final : public ProgressShadowElement {
@@ -55,8 +55,8 @@ public:
 private:
     explicit ProgressInnerElement(Document&);
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
 };
 
 class ProgressBarElement final : public ProgressShadowElement {