components/rappor/rappor_prefs.h

   1 // Copyright 2015 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 COMPONENTS_RAPPOR_RAPPOR_PREFS_H_
   6 #define COMPONENTS_RAPPOR_RAPPOR_PREFS_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11
  12 class PrefService;
  13 class PrefRegistrySimple;
  14
  15 namespace rappor {
  16
  17 namespace internal {
  18
  19 enum LoadResult {
  20   LOAD_SUCCESS = 0,
  21   LOAD_EMPTY_VALUE,
  22   LOAD_CORRUPT_VALUE,
  23   NUM_LOAD_RESULTS,
  24 };
  25
  26 extern const char kLoadCohortHistogramName[];
  27 extern const char kLoadSecretHistogramName[];
  28
  29 // Registers all rappor preferences.
  30 void RegisterPrefs(PrefRegistrySimple* registry);
  31
  32 // Retrieves the cohort number this client was assigned to, generating it if
  33 // doesn't already exist. The cohort should be persistent.
  34 int32_t LoadCohort(PrefService* pref_service);
  35
  36 // Retrieves the value for secret from preferences, generating it if doesn't
  37 // already exist. The secret should be persistent, so that additional bits
  38 // from the client do not get exposed over time.
  39 std::string LoadSecret(PrefService* pref_service);
  40
  41 }  // namespace internal
  42
  43 }  // namespace rappor
  44
  45 #endif  // COMPONENTS_RAPPOR_RAPPOR_PREFS_H_