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diff --git a/chromium/net/disk_cache/blockfile/experiments.h b/chromium/net/disk_cache/blockfile/experiments.h
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+// Copyright (c) 2011 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.
+
+#ifndef NET_DISK_CACHE_BLOCKFILE_EXPERIMENTS_H_
+#define NET_DISK_CACHE_BLOCKFILE_EXPERIMENTS_H_
+
+
+namespace disk_cache {
+
+// This lists the experiment groups that we care about. Only add new groups at
+// the end of the list, and always increase the number.
+enum {
+ NO_EXPERIMENT = 0,
+ EXPERIMENT_OLD_FILE1 = 3,
+ EXPERIMENT_OLD_FILE2 = 4,
+ EXPERIMENT_DELETED_LIST_OUT = 11,
+ EXPERIMENT_DELETED_LIST_CONTROL = 12,
+ EXPERIMENT_DELETED_LIST_IN = 13,
+ EXPERIMENT_DELETED_LIST_OUT2 = 14,
+ // There is no EXPERIMENT_SIMPLE_YES since this enum is used in the standard
+ // backend only.
+ EXPERIMENT_SIMPLE_CONTROL = 15,
+};
+
+} // namespace disk_cache
+
+#endif // NET_DISK_CACHE_BLOCKFILE_EXPERIMENTS_H_