Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/disk_format_v3.h

Index: net/disk_cache/blockfile/disk_format_v3.h
diff --git a/net/disk_cache/v3/disk_format_v3.h b/net/disk_cache/blockfile/disk_format_v3.h
similarity index 97%
rename from net/disk_cache/v3/disk_format_v3.h
rename to net/disk_cache/blockfile/disk_format_v3.h
index 7777c78315d0e584370acb275cb82f930b7019ab..f5811cc0fc42c85fd0a89e94e3b63e610f2e20bc 100644
--- a/net/disk_cache/v3/disk_format_v3.h
+++ b/net/disk_cache/blockfile/disk_format_v3.h
@@ -42,11 +42,11 @@
 // them, if files are to be moved accross machines, little endian storage is
 // assumed.
 
-#ifndef NET_DISK_CACHE_V3_DISK_FORMAT_V3_H_
-#define NET_DISK_CACHE_V3_DISK_FORMAT_V3_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_DISK_FORMAT_V3_H_
+#define NET_DISK_CACHE_BLOCKFILE_DISK_FORMAT_V3_H_
 
 #include "base/basictypes.h"
-#include "net/disk_cache/disk_format_base.h"
+#include "net/disk_cache/blockfile/disk_format_base.h"
 
 namespace disk_cache {
 
@@ -243,4 +243,4 @@ COMPILE_ASSERT(sizeof(ShortEntryRecord) == 48, bad_ShortEntryRecord);
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_V3_DISK_FORMAT_V3_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_DISK_FORMAT_V3_H_