Standardize usage of virtual/override/final in components/

components/feedback/feedback_uploader_delegate.h

Index: components/feedback/feedback_uploader_delegate.h
diff --git a/components/feedback/feedback_uploader_delegate.h b/components/feedback/feedback_uploader_delegate.h
index d674a101a4aac7094a7891fe952986c6bf05cbdf..93cbd6823d557e8934d8f0d3621f0ca2133da93f 100644
--- a/components/feedback/feedback_uploader_delegate.h
+++ b/components/feedback/feedback_uploader_delegate.h
@@ -22,11 +22,11 @@ class FeedbackUploaderDelegate : public net::URLFetcherDelegate {
   FeedbackUploaderDelegate(const std::string& post_body,
                            const base::Closure& success_callback,
                            const ReportDataCallback& error_callback);
-  virtual ~FeedbackUploaderDelegate();
+  ~FeedbackUploaderDelegate() override;
 
  private:
   // Overridden from net::URLFetcherDelegate.
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   std::string post_body_;
   base::Closure success_callback_;