Standardize usage of virtual/override/final in components/

components/visitedlink/browser/visitedlink_master.cc

Index: components/visitedlink/browser/visitedlink_master.cc
diff --git a/components/visitedlink/browser/visitedlink_master.cc b/components/visitedlink/browser/visitedlink_master.cc
index b02b076409afb97ac5218b546aaf40a2df126c64..dc59cae07e000ec5530c5fc3d12017ec6b4428ee 100644
--- a/components/visitedlink/browser/visitedlink_master.cc
+++ b/components/visitedlink/browser/visitedlink_master.cc
@@ -149,11 +149,11 @@ class VisitedLinkMaster::TableBuilder
   void DisownMaster();
 
   // VisitedLinkDelegate::URLEnumerator
-  virtual void OnURL(const GURL& url) override;
-  virtual void OnComplete(bool succeed) override;
+  void OnURL(const GURL& url) override;
+  void OnComplete(bool succeed) override;
 
  private:
-  virtual ~TableBuilder() {}
+  ~TableBuilder() override {}
 
   // OnComplete mashals to this function on the main thread to do the
   // notification.