Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/storage_block-inl.h

Index: net/disk_cache/blockfile/storage_block-inl.h
diff --git a/net/disk_cache/storage_block-inl.h b/net/disk_cache/blockfile/storage_block-inl.h
similarity index 94%
rename from net/disk_cache/storage_block-inl.h
rename to net/disk_cache/blockfile/storage_block-inl.h
index b9061861d8febde1ae837309f12a03d8bc1a1c00..f919c128c407629d2190bb04391fbfeff17bbf08 100644
--- a/net/disk_cache/storage_block-inl.h
+++ b/net/disk_cache/blockfile/storage_block-inl.h
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_DISK_CACHE_STORAGE_BLOCK_INL_H_
-#define NET_DISK_CACHE_STORAGE_BLOCK_INL_H_
+#ifndef NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_INL_H_
+#define NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_INL_H_
 
-#include "net/disk_cache/storage_block.h"
+#include "net/disk_cache/blockfile/storage_block.h"
 
 #include "base/hash.h"
 #include "base/logging.h"
-#include "net/disk_cache/trace.h"
+#include "net/disk_cache/blockfile/trace.h"
 
 namespace disk_cache {
 
@@ -202,4 +202,4 @@ template<typename T> uint32 StorageBlock<T>::CalculateHash() const {
 
 }  // namespace disk_cache
 
-#endif  // NET_DISK_CACHE_STORAGE_BLOCK_INL_H_
+#endif  // NET_DISK_CACHE_BLOCKFILE_STORAGE_BLOCK_INL_H_