Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/rankings.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_RANKINGS_H_
-#define NET_DISK_CACHE_RANKINGS_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_RANKINGS_H_
+#define NET_DISK_CACHE_BLOCKFILE_RANKINGS_H_
 
 #include <list>
 
 #include "base/memory/scoped_ptr.h"
-#include "net/disk_cache/addr.h"
-#include "net/disk_cache/mapped_file.h"
-#include "net/disk_cache/storage_block.h"
+#include "net/disk_cache/blockfile/addr.h"
+#include "net/disk_cache/blockfile/mapped_file.h"
+#include "net/disk_cache/blockfile/storage_block.h"
 
 namespace disk_cache {
 
 class BackendImpl;
 struct LruData;
 struct RankingsNode;
 typedef StorageBlock<RankingsNode> CacheRankingsBlock;
 
 // Type of crashes generated for the unit tests.
 enum RankCrashes {
@@ skipping 178 matching lines @@
   Addr tails_[LAST_ELEMENT];
   BackendImpl* backend_;
   LruData* control_data_;  // Data related to the LRU lists.
   IteratorList iterators_;
 
   DISALLOW_COPY_AND_ASSIGN(Rankings);
 };
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_RANKINGS_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_RANKINGS_H_