Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/sparse_control_v3.h

Index: net/disk_cache/blockfile/sparse_control_v3.h
diff --git a/net/disk_cache/v3/sparse_control_v3.h b/net/disk_cache/blockfile/sparse_control_v3.h
similarity index 96%
rename from net/disk_cache/v3/sparse_control_v3.h
rename to net/disk_cache/blockfile/sparse_control_v3.h
index 8455ad724b59b4e71574b0b853b62feb7252c86e..495ae191612c91b252e64828461dfea56f48b62a 100644
--- a/net/disk_cache/v3/sparse_control_v3.h
+++ b/net/disk_cache/blockfile/sparse_control_v3.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_DISK_CACHE_SPARSE_CONTROL_H_
-#define NET_DISK_CACHE_SPARSE_CONTROL_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_SPARSE_CONTROL_V3_H_
+#define NET_DISK_CACHE_BLOCKFILE_SPARSE_CONTROL_V3_H_
 
 #include <string>
 #include <vector>
@@ -11,7 +11,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "net/base/completion_callback.h"
-#include "net/disk_cache/bitmap.h"
+#include "net/disk_cache/blockfile/bitmap.h"
 #include "net/disk_cache/disk_format.h"
 
 namespace net {
@@ -172,4 +172,4 @@ class SparseControl {
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_SPARSE_CONTROL_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_SPARSE_CONTROL_V3_H_