RefCounted types should not have public destructors, webkit/ edition

webkit/dom_storage/dom_storage_context.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 WEBKIT_DOM_STORAGE_DOM_STORAGE_CONTEXT_H_
 #define WEBKIT_DOM_STORAGE_DOM_STORAGE_CONTEXT_H_
 #pragma once
 
 #include <map>
 #include <vector>
@@ skipping 67 matching lines @@
         const NullableString16& old_value,  // may be null on initial insert
         const GURL& page_url) = 0;
     virtual void OnDomStorageItemRemoved(
         const DomStorageArea* area,
         const string16& key,
         const string16& old_value,
         const GURL& page_url) = 0;
     virtual void OnDomStorageAreaCleared(
         const DomStorageArea* area,
         const GURL& page_url) = 0;
+
+   protected:
     virtual ~EventObserver() {}
   };
 
   DomStorageContext(
       const FilePath& localstorage_directory,  // empty for incognito profiles
       const FilePath& sessionstorage_directory,  // empty for incognito profiles
       quota::SpecialStoragePolicy* special_storage_policy,
       DomStorageTaskRunner* task_runner);
 
   // Returns the directory path for localStorage, or an empty directory, if
@@ skipping 94 matching lines @@
 
   bool is_shutdown_;
   bool clear_local_state_;
   bool save_session_state_;
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
 };
 
 }  // namespace dom_storage
 
 #endif  // WEBKIT_DOM_STORAGE_DOM_STORAGE_CONTEXT_H_