Move tracked prefs into services/preferences/tracked.

components/user_prefs/tracked/pref_hash_store.h

-// Copyright 2013 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 COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_
-#define COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_
-
-#include <memory>
-#include <string>
-
-#include "base/values.h"
-#include "components/user_prefs/tracked/pref_hash_store_transaction.h"
-
-class HashStoreContents;
-class PrefHashStoreTransaction;
-
-// Holds the configuration and implementation used to calculate and verify
-// preference MACs.
-// TODO(gab): Rename this class as it is no longer a store.
-class PrefHashStore {
- public:
-  virtual ~PrefHashStore() {}
-
-  // Returns a PrefHashStoreTransaction which can be used to perform a series
-  // of operations on the hash store. |storage| MAY be used as the backing store
-  // depending on the implementation. Therefore the HashStoreContents used for
-  // related transactions should correspond to the same underlying data store.
-  // |storage| must outlive the returned transaction.
-  virtual std::unique_ptr<PrefHashStoreTransaction> BeginTransaction(
-      HashStoreContents* storage) = 0;
-
-  // Computes the MAC to be associated with |path| and |value| in this store.
-  // PrefHashStoreTransaction typically uses this internally but it's also
-  // exposed for users that want to compute MACs ahead of time for asynchronous
-  // operations.
-  virtual std::string ComputeMac(const std::string& path,
-                                 const base::Value* value) = 0;
-
-  // Computes the MAC to be associated with |path| and |split_values| in this
-  // store. PrefHashStoreTransaction typically uses this internally but it's
-  // also exposed for users that want to compute MACs ahead of time for
-  // asynchronous operations.
-  virtual std::unique_ptr<base::DictionaryValue> ComputeSplitMacs(
-      const std::string& path,
-      const base::DictionaryValue* split_values) = 0;
-};
-
-#endif  // COMPONENTS_PREFS_TRACKED_PREF_HASH_STORE_H_