Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/file_ios.cc

Index: net/disk_cache/blockfile/file_ios.cc
diff --git a/net/disk_cache/file_ios.cc b/net/disk_cache/blockfile/file_ios.cc
similarity index 99%
rename from net/disk_cache/file_ios.cc
rename to net/disk_cache/blockfile/file_ios.cc
index 9cad1551f1548fce89858629f71e175b57ced677..48443bf2532c5aba6d7237d10499e73924a73e29 100644
--- a/net/disk_cache/file_ios.cc
+++ b/net/disk_cache/blockfile/file_ios.cc
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "net/disk_cache/file.h"
+#include "net/disk_cache/blockfile/file.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/threading/worker_pool.h"
 #include "net/base/net_errors.h"
+#include "net/disk_cache/blockfile/in_flight_io.h"
 #include "net/disk_cache/disk_cache.h"
-#include "net/disk_cache/in_flight_io.h"
 
 namespace {