RefCounted types should not have public destructors, chrome/browser/ part 5

chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc

Index: chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
diff --git a/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc b/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
index 824afd59bcb27292262b9fa26bb138c3cd098d48..47f9a190242ffe87144038690a6eb91c24373fa8 100644
--- a/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
+++ b/chrome/browser/printing/cloud_print/cloud_print_proxy_service.cc
@@ -37,19 +37,26 @@ class CloudPrintProxyService::TokenExpiredNotificationDelegate
       CloudPrintProxyService* cloud_print_service)
           : cloud_print_service_(cloud_print_service) {
   }
+
   void Display() {}
+
   void Error() {
     cloud_print_service_->OnTokenExpiredNotificationError();
   }
+
   void Close(bool by_user) {
     cloud_print_service_->OnTokenExpiredNotificationClosed(by_user);
   }
+
   void Click() {
     cloud_print_service_->OnTokenExpiredNotificationClick();
   }
+
   std::string id() const { return "cloudprint.tokenexpired"; }
 
  private:
+  virtual ~TokenExpiredNotificationDelegate() {}
+
   CloudPrintProxyService* cloud_print_service_;
   DISALLOW_COPY_AND_ASSIGN(TokenExpiredNotificationDelegate);
 };