Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/find_bar/find_tab_helper.h

Index: chrome/browser/ui/find_bar/find_tab_helper.h
diff --git a/chrome/browser/ui/find_bar/find_tab_helper.h b/chrome/browser/ui/find_bar/find_tab_helper.h
index 529ea5da955f1bfd84fa887fa1d0c7781d116276..9a5863367481614f82665546ecff469acbf8cc26 100644
--- a/chrome/browser/ui/find_bar/find_tab_helper.h
+++ b/chrome/browser/ui/find_bar/find_tab_helper.h
@@ -19,7 +19,7 @@ class RectF;
 class FindTabHelper : public content::WebContentsObserver,
                       public content::WebContentsUserData<FindTabHelper> {
  public:
-  virtual ~FindTabHelper();
+  ~FindTabHelper() override;
 
   // Starts the Find operation by calling StartFinding on the Tab. This function
   // can be called from the outside as a result of hot-keys, so it uses the