RefCounted types should not have public destructors, chrome/browser/ui

chrome/browser/ui/webui/about_ui.cc

Index: chrome/browser/ui/webui/about_ui.cc
diff --git a/chrome/browser/ui/webui/about_ui.cc b/chrome/browser/ui/webui/about_ui.cc
index eb82960a3bced8080b722fd87d5e59c4e2dc3179..458b43c9c80bdb7883fd62bef3dec0884ca692a3 100644
--- a/chrome/browser/ui/webui/about_ui.cc
+++ b/chrome/browser/ui/webui/about_ui.cc
@@ -744,12 +744,16 @@ class AboutDnsHandler : public base::RefCountedThreadSafe<AboutDnsHandler> {
   }
 
  private:
+  friend class base::RefCountedThreadSafe<AboutDnsHandler>;
+
   AboutDnsHandler(AboutUIHTMLSource* source, int request_id)
       : source_(source),
         request_id_(request_id) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   }
 
+  virtual ~AboutDnsHandler() {}
+
   // Calls FinishOnUIThread() on completion.
   void StartOnUIThread() {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));