diff options
Diffstat (limited to 'chromium/components/variations/active_field_trials.cc')
-rw-r--r-- | chromium/components/variations/active_field_trials.cc | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/chromium/components/variations/active_field_trials.cc b/chromium/components/variations/active_field_trials.cc new file mode 100644 index 00000000000..07c8b6b599e --- /dev/null +++ b/chromium/components/variations/active_field_trials.cc @@ -0,0 +1,74 @@ +// Copyright 2014 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. + +#include "components/variations/active_field_trials.h" + +#include <stddef.h> + +#include <vector> + +#include "base/strings/stringprintf.h" +#include "base/strings/utf_string_conversions.h" +#include "components/variations/metrics_util.h" + +namespace variations { + +namespace { + +// Populates |name_group_ids| based on |active_groups|. +void GetFieldTrialActiveGroupIdsForActiveGroups( + const base::FieldTrial::ActiveGroups& active_groups, + std::vector<ActiveGroupId>* name_group_ids) { + DCHECK(name_group_ids->empty()); + for (base::FieldTrial::ActiveGroups::const_iterator it = + active_groups.begin(); it != active_groups.end(); ++it) { + name_group_ids->push_back(MakeActiveGroupId(it->trial_name, + it->group_name)); + } +} + +} // namespace + +ActiveGroupId MakeActiveGroupId(const std::string& trial_name, + const std::string& group_name) { + ActiveGroupId id; + id.name = metrics::HashName(trial_name); + id.group = metrics::HashName(group_name); + return id; +} + +void GetFieldTrialActiveGroupIds( + std::vector<ActiveGroupId>* name_group_ids) { + DCHECK(name_group_ids->empty()); + // A note on thread safety: Since GetActiveFieldTrialGroups() is thread + // safe, and we operate on a separate list of that data, this function is + // technically thread safe as well, with respect to the FieldTrialList data. + base::FieldTrial::ActiveGroups active_groups; + base::FieldTrialList::GetActiveFieldTrialGroups(&active_groups); + GetFieldTrialActiveGroupIdsForActiveGroups(active_groups, + name_group_ids); +} + +void GetFieldTrialActiveGroupIdsAsStrings(std::vector<std::string>* output) { + DCHECK(output->empty()); + std::vector<ActiveGroupId> name_group_ids; + GetFieldTrialActiveGroupIds(&name_group_ids); + for (size_t i = 0; i < name_group_ids.size(); ++i) { + output->push_back(base::StringPrintf( + "%x-%x", name_group_ids[i].name, name_group_ids[i].group)); + } +} + +namespace testing { + +void TestGetFieldTrialActiveGroupIds( + const base::FieldTrial::ActiveGroups& active_groups, + std::vector<ActiveGroupId>* name_group_ids) { + GetFieldTrialActiveGroupIdsForActiveGroups(active_groups, + name_group_ids); +} + +} // namespace testing + +} // namespace variations |