Fix virtual/override/final usage in Source/modules/.

Source/modules/accessibility/AXListBox.h

Index: Source/modules/accessibility/AXListBox.h
diff --git a/Source/modules/accessibility/AXListBox.h b/Source/modules/accessibility/AXListBox.h
index f2fd0695ae84105ebffc04ac0e1ab1e396f5b706..ac24ac403a3149d9fcac364850f3a3c24c48698b 100644
--- a/Source/modules/accessibility/AXListBox.h
+++ b/Source/modules/accessibility/AXListBox.h
@@ -42,12 +42,12 @@ private:
 
 public:
     static PassRefPtrWillBeRawPtr<AXListBox> create(LayoutObject*, AXObjectCacheImpl&);
-    virtual ~AXListBox();
+    ~AXListBox() override;
 
-    virtual AccessibilityRole determineAccessibilityRole() override final;
-    virtual bool isAXListBox() const override { return true; }
-    virtual bool shouldFocusActiveDescendant() const override { return true; }
-    virtual AXObject* activeDescendant() const override;
+    AccessibilityRole determineAccessibilityRole() final;
+    bool isAXListBox() const override { return true; }
+    bool shouldFocusActiveDescendant() const override { return true; }
+    AXObject* activeDescendant() const override;
 
     void activeIndexChanged();