Reorganize net/disk_cache into backend specific directories.

net/disk_cache/v2/file_lock.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.
 
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
-#ifndef NET_DISK_CACHE_FILE_LOCK_H_
-#define NET_DISK_CACHE_FILE_LOCK_H_
+#ifndef NET_DISK_CACHE_V2_FILE_LOCK_H_
+#define NET_DISK_CACHE_V2_FILE_LOCK_H_
 
 #include "net/base/net_export.h"
-#include "net/disk_cache/disk_format_base.h"
+#include "net/disk_cache/v2/disk_format_base.h"
 
 namespace disk_cache {
 
 // This class implements a file lock that lives on the header of a memory mapped
 // file. This is NOT a thread related lock, it is a lock to detect corruption
 // of the file when the process crashes in the middle of an update.
 // The lock is acquired on the constructor and released on the destructor.
 // The typical use of the class is:
 //    {
 //      BlockFileHeader* header = GetFileHeader();
@@ skipping 13 matching lines @@
   // Virtual to make sure the compiler never inlines the calls.
   virtual void Lock();
   virtual void Unlock();
  private:
   bool acquired_;
   volatile int32* updating_;
 };
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_FILE_LOCK_H_
+#endif  // NET_DISK_CACHE_V2_FILE_LOCK_H_