chrome/common/variations/experiment_labels.h

   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_COMMON_VARIATIONS_EXPERIMENT_LABELS_H_
   6 #define CHROME_COMMON_VARIATIONS_EXPERIMENT_LABELS_H_
   7
   8 #include "base/metrics/field_trial.h"
   9 #include "base/strings/string16.h"
  10
  11 namespace chrome_variations {
  12
  13 // Takes the list of active groups and builds the label for the ones that have
  14 // Google Update VariationID associated with them. This will return an empty
  15 // string if there are no such groups.
  16 base::string16 BuildGoogleUpdateExperimentLabel(
  17     const base::FieldTrial::ActiveGroups& active_groups);
  18
  19 // Creates a final combined experiment labels string with |variation_labels|
  20 // and |other_labels|, appropriately appending a separator based on their
  21 // contents. It is assumed that |variation_labels| and |other_labels| do not
  22 // have leading or trailing separators.
  23 base::string16 CombineExperimentLabels(const base::string16& variation_labels,
  24                                        const base::string16& other_labels);
  25
  26 // Takes the value of experiment_labels from the registry and returns a valid
  27 // experiment_labels string value containing only the labels that are not
  28 // associated with Chrome Variations.
  29 base::string16 ExtractNonVariationLabels(const base::string16& labels);
  30
  31 }  // namespace chrome_variations
  32
  33 #endif  // CHROME_COMMON_VARIATIONS_EXPERIMENT_LABELS_H_