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      1 // Copyright 2014 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_TRACKED_TRACKED_PREFERENCES_MIGRATION_H_
      6 #define CHROME_BROWSER_PREFS_TRACKED_TRACKED_PREFERENCES_MIGRATION_H_
      7 
      8 #include <set>
      9 #include <string>
     10 
     11 #include "base/callback_forward.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "chrome/browser/prefs/pref_hash_store.h"
     14 
     15 class HashStoreContents;
     16 class InterceptablePrefFilter;
     17 class PrefHashStore;
     18 
     19 // Sets up InterceptablePrefFilter::FilterOnLoadInterceptors on
     20 // |unprotected_pref_filter| and |protected_pref_filter| which prevents each
     21 // filter from running their on load operations until the interceptors decide to
     22 // hand the prefs back to them (after migration is complete). |
     23 // (un)protected_store_cleaner| and
     24 // |register_on_successful_(un)protected_store_write_callback| are used to do
     25 // post-migration cleanup tasks. Those should be bound to weak pointers to avoid
     26 // blocking shutdown. |(un)protected_pref_hash_store| and
     27 // |legacy_pref_hash_store| are used to migrate MACs along with their protected
     28 // preferences and/or from the legacy location in Local State. Migrated MACs
     29 // will only be cleared from their old location in a subsequent run. The
     30 // migration framework is resilient to a failed cleanup (it will simply try
     31 // again in the next Chrome run).
     32 void SetupTrackedPreferencesMigration(
     33     const std::set<std::string>& unprotected_pref_names,
     34     const std::set<std::string>& protected_pref_names,
     35     const base::Callback<void(const std::string& key)>&
     36         unprotected_store_cleaner,
     37     const base::Callback<void(const std::string& key)>& protected_store_cleaner,
     38     const base::Callback<void(const base::Closure&)>&
     39         register_on_successful_unprotected_store_write_callback,
     40     const base::Callback<void(const base::Closure&)>&
     41         register_on_successful_protected_store_write_callback,
     42     scoped_ptr<PrefHashStore> unprotected_pref_hash_store,
     43     scoped_ptr<PrefHashStore> protected_pref_hash_store,
     44     scoped_ptr<HashStoreContents> legacy_pref_hash_store,
     45     InterceptablePrefFilter* unprotected_pref_filter,
     46     InterceptablePrefFilter* protected_pref_filter);
     47 
     48 #endif  // CHROME_BROWSER_PREFS_TRACKED_TRACKED_PREFERENCES_MIGRATION_H_
     49