#include "net/disk_cache/storage_block-inl.h"
#include "net/disk_cache/v3/disk_format_v3.h"
#include "net/disk_cache/v3/entry_impl_v3.h"
+#include "net/disk_cache/v3/histogram_macros.h"
#include "net/disk_cache/v3/index_table.h"
-// This has to be defined before including histogram_macros.h from this file.
-#define NET_DISK_CACHE_BACKEND_IMPL_CC_
-#include "net/disk_cache/v3/histogram_macros.h"
+// Provide a BackendImpl object to macros from histogram_macros.h.
+#define CACHE_UMA_BACKEND_IMPL_OBJ this
using base::Time;
using base::TimeDelta;