chrome/browser/prefs/pref_hash_store.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_PREFS_PREF_HASH_STORE_H_
   6 #define CHROME_BROWSER_PREFS_PREF_HASH_STORE_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9
  10 class PrefHashStoreTransaction;
  11
  12 // Stores hashes of and verifies preference values via
  13 // PrefHashStoreTransactions.
  14 class PrefHashStore {
  15  public:
  16   virtual ~PrefHashStore() {}
  17
  18   // Returns a PrefHashStoreTransaction which can be used to perform a series
  19   // of checks/transformations on the hash store.
  20   virtual scoped_ptr<PrefHashStoreTransaction> BeginTransaction() = 0;
  21
  22   // Commits this store to disk if it has changed since the last call to this
  23   // method.
  24   virtual void CommitPendingWrite() = 0;
  25 };
  26
  27 #endif  // CHROME_BROWSER_PREFS_PREF_HASH_STORE_H_