Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/block_bitmaps_v3.cc

Index: net/disk_cache/blockfile/block_bitmaps_v3.cc
diff --git a/net/disk_cache/v3/block_bitmaps.cc b/net/disk_cache/blockfile/block_bitmaps_v3.cc
similarity index 97%
rename from net/disk_cache/v3/block_bitmaps.cc
rename to net/disk_cache/blockfile/block_bitmaps_v3.cc
index b68ecdd14f940048730b443b4b2a4aac59f03cd3..984ce491404762e62d57e4978cd8d136c03729bd 100644
--- a/net/disk_cache/v3/block_bitmaps.cc
+++ b/net/disk_cache/blockfile/block_bitmaps_v3.cc
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "net/disk_cache/v3/block_bitmaps.h"
+#include "net/disk_cache/blockfile/block_bitmaps_v3.h"
 
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
-#include "net/disk_cache/disk_format_base.h"
-#include "net/disk_cache/trace.h"
+#include "net/disk_cache/blockfile/disk_format_base.h"
+#include "net/disk_cache/blockfile/trace.h"
 
 using base::TimeTicks;