Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/stress_support.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.
 
-#ifndef NET_DISK_CACHE_STRESS_SUPPORT_H_
-#define NET_DISK_CACHE_STRESS_SUPPORT_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_STRESS_SUPPORT_H_
+#define NET_DISK_CACHE_BLOCKFILE_STRESS_SUPPORT_H_
 
 #include "base/logging.h"
 
 namespace disk_cache {
 
 // Uncomment this line to generate a debug build of stress_cache with checks
 // to ensure that we are not producing corrupt entries.
 // #define NET_BUILD_STRESS_CACHE 1
 
 // Uncomment this line to direct the in-memory disk cache tracing to the base
@@ skipping 12 matching lines @@
 #else
 // We don't support streams with these macros, but that's a small price to pay
 // to have a straightforward logic here. Please don't add something like
 // LogMessageVoidify.
 #define STRESS_NOTREACHED() {}
 #define STRESS_DCHECK(a) {}
 #endif
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_STRESS_SUPPORT_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_STRESS_SUPPORT_H_