RefCounted types should not have public destructors, webkit/ edition

webkit/appcache/appcache_interfaces.h

 // Copyright (c) 2011 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_APPCACHE_APPCACHE_INTERFACES_H_
 #define WEBKIT_APPCACHE_APPCACHE_INTERFACES_H_
 
 #include <string>
 #include <vector>
 #include "base/basictypes.h"
@@ skipping 134 matching lines @@
                            int host_id,
                            int64 appcache_id) = 0;
   virtual void MarkAsForeignEntry(int host_id, const GURL& document_url,
                                   int64 cache_document_was_loaded_from) = 0;
   virtual Status GetStatus(int host_id) = 0;
   virtual bool StartUpdate(int host_id) = 0;
   virtual bool SwapCache(int host_id) = 0;
   virtual void GetResourceList(
       int host_id, std::vector<AppCacheResourceInfo>* resource_infos) = 0;
 
+ protected:
   virtual ~AppCacheBackend() {}
 };
 
 // Useful string constants.
 // Note: These are also defined elsewhere in the chrome code base in
 // url_contants.h .cc, however the appcache library doesn't not have
 // any dependencies on the chrome library, so we can't use them in here.
 extern const char kHttpScheme[];
 extern const char kHttpsScheme[];
 extern const char kHttpGETMethod[];
 extern const char kHttpHEADMethod[];
 
 bool IsSchemeSupported(const GURL& url);
 bool IsMethodSupported(const std::string& method);
 bool IsSchemeAndMethodSupported(const net::URLRequest* request);
 
 APPCACHE_EXPORT extern const FilePath::CharType kAppCacheDatabaseName[];
 
 }  // namespace
 
 #endif  // WEBKIT_APPCACHE_APPCACHE_INTERFACES_H_