Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/storage_block.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.
 
 // See net/disk_cache/disk_cache.h for the public interface.
 
-#ifndef NET_DISK_CACHE_STORAGE_BLOCK_H_
-#define NET_DISK_CACHE_STORAGE_BLOCK_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_H_
+#define NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_H_
 
-#include "net/disk_cache/addr.h"
-#include "net/disk_cache/mapped_file.h"
+#include "net/disk_cache/blockfile/addr.h"
+#include "net/disk_cache/blockfile/mapped_file.h"
 
 namespace disk_cache {
 
 // This class encapsulates common behavior of a single "block" of data that is
 // stored on a block-file. It implements the FileBlock interface, so it can be
 // serialized directly to the backing file.
 // This object provides a memory buffer for the related data, and it can be used
 // to actually share that memory with another instance of the class.
 //
 // The following example shows how to share storage with another object:
@@ skipping 65 matching lines @@
   Addr address_;
   bool modified_;
   bool own_data_;  // Is data_ owned by this object or shared with someone else.
   bool extended_;  // Used to store an entry of more than one block.
 
   DISALLOW_COPY_AND_ASSIGN(StorageBlock);
 };
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_STORAGE_BLOCK_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_H_