RefCounted types should not have public destructors

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc

Index: chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc b/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
index 724b5f8148b0d28a0d9d940654fe83ec7cc245b3..046d1db2150f00b6022ee329002217f5ceab305f 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
@@ -33,9 +33,10 @@ namespace keys2 = url_matcher_constants;
 class TestWebRequestRulesRegistry : public WebRequestRulesRegistry {
  public:
   TestWebRequestRulesRegistry() : WebRequestRulesRegistry(NULL) {}
-  virtual ~TestWebRequestRulesRegistry() {}
 
  protected:
+  virtual ~TestWebRequestRulesRegistry() {}
+
   virtual base::Time GetExtensionInstallationTime(
       const std::string& extension_id) const {
     if (extension_id == kExtensionId)