Second patch in making destructors of refcounted objects private.

net/disk_cache/mapped_file.h

 // Copyright (c) 2006-2008 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.
 
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_MAPPED_FILE_H_
 #define NET_DISK_CACHE_MAPPED_FILE_H_
 
 #include <string>
@@ skipping 20 matching lines @@
   void* Init(const FilePath& name, size_t size);
 
   void* buffer() const {
     return buffer_;
   }
 
   // Loads or stores a given block from the backing file (synchronously).
   bool Load(const FileBlock* block);
   bool Store(const FileBlock* block);
 
- protected:
+ private:
   virtual ~MappedFile();
 
- private:
   bool init_;
 #if defined(OS_WIN)
   HANDLE section_;
 #endif
   void* buffer_;  // Address of the memory mapped buffer.
   size_t view_size_;  // Size of the memory pointed by buffer_.
 
   DISALLOW_COPY_AND_ASSIGN(MappedFile);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_MAPPED_FILE_H_