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

Source/modules/accessibility/AXList.h

Index: Source/modules/accessibility/AXList.h
diff --git a/Source/modules/accessibility/AXList.h b/Source/modules/accessibility/AXList.h
index 0111635b229113a4ced82a93cb5126ff8a1d33ca..1113151ab684bad59e5e0e5cb4c413b7953f3f84 100644
--- a/Source/modules/accessibility/AXList.h
+++ b/Source/modules/accessibility/AXList.h
@@ -42,14 +42,14 @@ private:
 
 public:
     static PassRefPtrWillBeRawPtr<AXList> create(LayoutObject*, AXObjectCacheImpl&);
-    virtual ~AXList();
+    ~AXList() override;
 
-    virtual bool isList() const override { return true; }
+    bool isList() const override { return true; }
 
-    virtual AccessibilityRole roleValue() const override final;
+    AccessibilityRole roleValue() const final;
 private:
     bool isDescriptionList() const;
-    virtual bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
+    bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
 };
 
 } // namespace blink