Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/backend_impl_v3.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 of the cache.
 
-#ifndef NET_DISK_CACHE_V3_BACKEND_IMPL_V3_H_
-#define NET_DISK_CACHE_V3_BACKEND_IMPL_V3_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_
+#define NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
 #include "base/timer/timer.h"
-#include "net/disk_cache/block_files.h"
+#include "net/disk_cache/blockfile/block_bitmaps_v3.h"
+#include "net/disk_cache/blockfile/block_files.h"
+#include "net/disk_cache/blockfile/eviction_v3.h"
+#include "net/disk_cache/blockfile/index_table_v3.h"
+#include "net/disk_cache/blockfile/stats.h"
+#include "net/disk_cache/blockfile/stress_support.h"
+#include "net/disk_cache/blockfile/trace.h"
 #include "net/disk_cache/disk_cache.h"
-#include "net/disk_cache/stats.h"
-#include "net/disk_cache/stress_support.h"
-#include "net/disk_cache/trace.h"
-#include "net/disk_cache/v3/block_bitmaps.h"
-#include "net/disk_cache/v3/eviction_v3.h"
-#include "net/disk_cache/v3/index_table.h"
 
 namespace net {
 class NetLog;
 }  // namespace net
 
 namespace disk_cache {
 
 class EntryImplV3;
 
 // This class implements the Backend interface. An object of this
@@ skipping 242 matching lines @@
   Stats stats_;  // Usage statistics.
   scoped_ptr<base::RepeatingTimer<BackendImplV3> > timer_;  // Usage timer.
   scoped_refptr<TraceObject> trace_object_;  // Initializes internal tracing.
   base::WeakPtrFactory<BackendImplV3> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackendImplV3);
 };
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_V3_BACKEND_IMPL_V3_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_