Disk cache v3 ref2

net/disk_cache/mapped_file.h

Index: net/disk_cache/mapped_file.h
===================================================================
--- net/disk_cache/mapped_file.h	(revision 232523)
+++ net/disk_cache/mapped_file.h	(working copy)
@@ -30,6 +30,11 @@
   // will be mapped in memory.
   void* Init(const base::FilePath& name, size_t size);
 
+  // Performs object initialization without actually mapping any portion of the
+  // file. It assumes that the bitmap and header (of the related block file) are
+  // mapped somewhere else.
+  bool InitNoMap(const base::FilePath& name);
+
   void* buffer() const {
     return buffer_;
   }