Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/block_bitmaps_v3.h

Index: net/disk_cache/blockfile/block_bitmaps_v3.h
diff --git a/net/disk_cache/v3/block_bitmaps.h b/net/disk_cache/blockfile/block_bitmaps_v3.h
similarity index 88%
rename from net/disk_cache/v3/block_bitmaps.h
rename to net/disk_cache/blockfile/block_bitmaps_v3.h
index 111d57b0b133a869a87779ece186c63c8497b496..40eefb14a74f2e4f3eb9d4f7ce6bf25b2ef70340 100644
--- a/net/disk_cache/v3/block_bitmaps.h
+++ b/net/disk_cache/blockfile/block_bitmaps_v3.h
@@ -4,13 +4,13 @@
 
 // See net/disk_cache/disk_cache.h for the public interface.
 
-#ifndef NET_DISK_CACHE_V3_BLOCK_BITMAPS_H_
-#define NET_DISK_CACHE_V3_BLOCK_BITMAPS_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_BLOCK_BITMAPS_V3_H_
+#define NET_DISK_CACHE_BLOCKFILE_BLOCK_BITMAPS_V3_H_
 
 #include "base/files/file_path.h"
 #include "net/base/net_export.h"
-#include "net/disk_cache/addr.h"
-#include "net/disk_cache/block_files.h"
+#include "net/disk_cache/blockfile/addr.h"
+#include "net/disk_cache/blockfile/block_files.h"
 
 namespace disk_cache {
 
@@ -62,4 +62,4 @@ class NET_EXPORT_PRIVATE BlockBitmaps {
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_V3_BLOCK_BITMAPS_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_BLOCK_BITMAPS_V3_H_