Metrics for feature engagement tracker.

components/feature_engagement_tracker/internal/single_invalid_configuration.cc

 // Copyright 2017 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/feature_engagement_tracker/internal/single_invalid_configuration.h"
 
 #include "components/feature_engagement_tracker/internal/configuration.h"
 
 namespace feature_engagement_tracker {
 
 SingleInvalidConfiguration::SingleInvalidConfiguration() {
   invalid_feature_config_.valid = false;
   invalid_feature_config_.used.name = "nothing_to_see_here";
 };
 
 SingleInvalidConfiguration::~SingleInvalidConfiguration() = default;
 
 const FeatureConfig& SingleInvalidConfiguration::GetFeatureConfig(
     const base::Feature& feature) const {
   return invalid_feature_config_;
 }
 
+const Configuration::ConfigMap&
+SingleInvalidConfiguration::GetRegisteredFeatures() const {
+  return configs_;
+}
+
 }  // namespace feature_engagement_tracker