Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/addr.h

Index: net/disk_cache/blockfile/addr.h
diff --git a/net/disk_cache/addr.h b/net/disk_cache/blockfile/addr.h
similarity index 96%
rename from net/disk_cache/addr.h
rename to net/disk_cache/blockfile/addr.h
index 664e462fb3424f6f88e0781a1a6cb65c32444a57..99d2c9307099a4a556a18a621b4aeb49a2b0282b 100644
--- a/net/disk_cache/addr.h
+++ b/net/disk_cache/blockfile/addr.h
@@ -5,11 +5,11 @@
 // This is an internal class that handles the address of a cache record.
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
-#ifndef NET_DISK_CACHE_ADDR_H_
-#define NET_DISK_CACHE_ADDR_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_ADDR_H_
+#define NET_DISK_CACHE_BLOCKFILE_ADDR_H_
 
 #include "net/base/net_export.h"
-#include "net/disk_cache/disk_format_base.h"
+#include "net/disk_cache/blockfile/disk_format_base.h"
 
 namespace disk_cache {
 
@@ -185,4 +185,4 @@ class NET_EXPORT_PRIVATE Addr {
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_ADDR_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_ADDR_H_