Reorganize net/disk_cache into backend specific directories.

net/disk_cache/blockfile/eviction.cc

Index: net/disk_cache/blockfile/eviction.cc
diff --git a/net/disk_cache/eviction.cc b/net/disk_cache/blockfile/eviction.cc
similarity index 98%
rename from net/disk_cache/eviction.cc
rename to net/disk_cache/blockfile/eviction.cc
index 3e2c779d51a0c9427264f88f7d2012769cbda8a1..6355bc635a1459f00d1e7dbd0cd09a29355ba5e3 100644
--- a/net/disk_cache/eviction.cc
+++ b/net/disk_cache/blockfile/eviction.cc
@@ -26,7 +26,7 @@
 // size so that we have a chance to see an element again and move it to another
 // list.
 
-#include "net/disk_cache/eviction.h"
+#include "net/disk_cache/blockfile/eviction.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ -34,12 +34,12 @@
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
-#include "net/disk_cache/backend_impl.h"
-#include "net/disk_cache/disk_format.h"
-#include "net/disk_cache/entry_impl.h"
-#include "net/disk_cache/experiments.h"
-#include "net/disk_cache/histogram_macros.h"
-#include "net/disk_cache/trace.h"
+#include "net/disk_cache/blockfile/backend_impl.h"
+#include "net/disk_cache/blockfile/disk_format.h"
+#include "net/disk_cache/blockfile/entry_impl.h"
+#include "net/disk_cache/blockfile/experiments.h"
+#include "net/disk_cache/blockfile/histogram_macros.h"
+#include "net/disk_cache/blockfile/trace.h"
 
 // Provide a BackendImpl object to macros from histogram_macros.h.
 #define CACHE_UMA_BACKEND_IMPL_OBJ backend_