Disk cache: Reference CL for the implementation of file format version 3.

net/disk_cache/errors.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Error codes reported by self tests or to UMA.
 
 #ifndef NET_DISK_CACHE_ERRORS_H__
 #define NET_DISK_CACHE_ERRORS_H__
 
 namespace disk_cache {
 
 enum {
   ERR_NO_ERROR = 0,
   ERR_INIT_FAILED = -1,
   ERR_INVALID_TAIL = -2,
   ERR_INVALID_HEAD = -3,
   ERR_INVALID_PREV = -4,
   ERR_INVALID_NEXT = -5,
   ERR_INVALID_ENTRY = -6,
   ERR_INVALID_ADDRESS = -7,
   ERR_INVALID_LINKS = -8,
   ERR_NUM_ENTRIES_MISMATCH = -9,
   ERR_READ_FAILURE = -10,
   ERR_PREVIOUS_CRASH = -11,
   ERR_STORAGE_ERROR = -12,
   ERR_INVALID_MASK = -13,
   ERR_CACHE_DOOMED = -14,   // Not really an error condition.
-  ERR_CACHE_CREATED = -15   // Not really an error condition.
+  ERR_CACHE_CREATED = -15,  // Not really an error condition.
+  ERR_PENDING = -16,        // Not really an error condition.
+  ERR_OPERATION_FAILED = -17,
+  ERR_WRITE_FAILURE = -18
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_ERRORS_H__