Import Cobalt 24.master.0.1032339
diff --git a/components/variations/processed_study.h b/components/variations/processed_study.h
new file mode 100644
index 0000000..504b5f4
--- /dev/null
+++ b/components/variations/processed_study.h
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+// Copyright 2013 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.
+
+#ifndef COMPONENTS_VARIATIONS_PROCESSED_STUDY_H_
+#define COMPONENTS_VARIATIONS_PROCESSED_STUDY_H_
+
+#include <string>
+#include <vector>
+
+#include "base/metrics/field_trial.h"
+
+namespace variations {
+
+class Study;
+
+// Wrapper over Study with extra information computed during pre-processing,
+// such as whether the study is expired and its total probability.
+class ProcessedStudy {
+ public:
+ // The default group used when a study doesn't specify one. This is needed
+ // because the field trial api requires a default group name.
+ static const char kGenericDefaultExperimentName[];
+
+ ProcessedStudy();
+ ProcessedStudy(const ProcessedStudy& other);
+ ~ProcessedStudy();
+
+ bool Init(const Study* study, bool is_expired);
+
+ const Study* study() const { return study_; }
+
+ base::FieldTrial::Probability total_probability() const {
+ return total_probability_;
+ }
+
+ bool all_assignments_to_one_group() const {
+ return all_assignments_to_one_group_;
+ }
+
+ bool is_expired() const { return is_expired_; }
+
+ const std::vector<std::string>& associated_features() const {
+ return associated_features_;
+ }
+
+ // Gets the index of the experiment with the given |name|. Returns -1 if no
+ // experiment is found.
+ int GetExperimentIndexByName(const std::string& name) const;
+
+ // Gets the default experiment name for the study, or a generic one if none is
+ // specified.
+ const char* GetDefaultExperimentName() const;
+
+ static bool ValidateAndAppendStudy(
+ const Study* study,
+ bool is_expired,
+ std::vector<ProcessedStudy>* processed_studies);
+
+ private:
+ // Corresponding Study object. Weak reference.
+ const Study* study_ = nullptr;
+
+ // Computed total group probability for the study.
+ base::FieldTrial::Probability total_probability_ = 0;
+
+ // Whether all assignments are to a single group.
+ bool all_assignments_to_one_group_ = false;
+
+ // Whether the study is expired.
+ bool is_expired_ = false;
+
+ // A list of feature names associated with this study by default. Studies
+ // might have groups that do not specify any feature associations – this is
+ // often the case for a default group, for example. The features listed here
+ // will be associated with all such groups.
+ std::vector<std::string> associated_features_;
+};
+
+} // namespace variations
+
+#endif // COMPONENTS_VARIATIONS_PROCESSED_STUDY_H_
