weblayer/browser/feature_list_creator.h

// Copyright 2019 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 WEBLAYER_BROWSER_FEATURE_LIST_CREATOR_H_
#define WEBLAYER_BROWSER_FEATURE_LIST_CREATOR_H_

#include <memory>

#include "components/prefs/pref_service.h"
#include "components/variations/service/variations_service.h"
#include "weblayer/browser/weblayer_field_trials.h"

namespace weblayer {
class SystemNetworkContextManager;

// Used by WebLayer to set up field trials based on the stored variations
// seed data. Once created this object must exist for the lifetime of the
// process as it contains the FieldTrialList that can be queried for the state
// of experiments.
class FeatureListCreator {
 public:
  FeatureListCreator();
  ~FeatureListCreator();

  void SetSystemNetworkContextManager(
      SystemNetworkContextManager* system_network_context_manager);

  // Must be called after SetSharedURLLoaderFactory.
  void CreateFeatureListAndFieldTrials();

  PrefService* local_state() const { return local_state_.get(); }

 private:
  void SetUpFieldTrials();

  std::unique_ptr<PrefService> local_state_;

  SystemNetworkContextManager* system_network_context_manager_;  // NOT OWNED.

  std::unique_ptr<variations::VariationsService> variations_service_;

  WebLayerFieldTrials weblayer_field_trials_;

  DISALLOW_COPY_AND_ASSIGN(FeatureListCreator);
};

}  // namespace weblayer

#endif  // WEBLAYER_BROWSER_FEATURE_LIST_CREATOR_H_