RefCounted types should not have public destructors, chromeos edition

chrome/browser/chromeos/login/signed_settings.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 33 matching lines @@
   };
 
   template <class T>
   class Delegate {
    public:
     // This method will be called on the UI thread.
     virtual void OnSettingsOpCompleted(ReturnCode code, T value) {}
   };
 
   SignedSettings();
-  virtual ~SignedSettings();
 
   // These are both "policy" operations, and only one instance of
   // one type can be in flight at a time.
   static SignedSettings* CreateStorePolicyOp(
       enterprise_management::PolicyFetchResponse* policy,
       SignedSettings::Delegate<bool>* d);
 
   static SignedSettings* CreateRetrievePolicyOp(
       SignedSettings::Delegate<
           const enterprise_management::PolicyFetchResponse&>* d);
 
   static ReturnCode MapKeyOpCode(OwnerManager::KeyOpCode code);
 
   virtual void Execute() = 0;
 
   virtual void Fail(ReturnCode code) = 0;
 
   // Implementation of OwnerManager::Delegate
   virtual void OnKeyOpComplete(const OwnerManager::KeyOpCode return_code,
                                const std::vector<uint8>& payload) = 0;
 
  protected:
+  virtual ~SignedSettings();
+
   static bool PolicyIsSane(
       const enterprise_management::PolicyFetchResponse& value,
       enterprise_management::PolicyData* poldata);
 
   void set_service(OwnershipService* service) { service_ = service; }
 
   OwnershipService* service_;
 
  private:
+  friend class base::RefCountedThreadSafe<SignedSettings>;
   friend class SignedSettingsTest;
   friend class SignedSettingsHelperTest;
 
   DISALLOW_COPY_AND_ASSIGN(SignedSettings);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNED_SETTINGS_H_