Metrics for feature engagement tracker.

components/feature_engagement_tracker/internal/editable_configuration.h

 // 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.
 
 #ifndef COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_EDITABLE_CONFIGURATION_H_
 #define COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_EDITABLE_CONFIGURATION_H_
 
 #include "base/macros.h"
 #include "components/feature_engagement_tracker/internal/configuration.h"
 
 namespace base {
 struct Feature;
 }  // namespace base
 
 namespace feature_engagement_tracker {
 
 // An EditableConfiguration provides a configuration that can be configured
 // by calling SetConfiguration(...) for each feature, which makes it well
 // suited for simple setup and tests.
 class EditableConfiguration : public Configuration {
  public:
   EditableConfiguration();
   ~EditableConfiguration() override;
 
-  // Configuration implementaiton.
+  // Configuration implementation.
   const FeatureConfig& GetFeatureConfig(
       const base::Feature& feature) const override;
+  const Configuration::ConfigMap& GetRegisteredFeatures() const override;
 
   // Adds a new FeatureConfig to the current configurations. If it already
   // exists, the contents are replaced.
   void SetConfiguration(const base::Feature* feature,
                         const FeatureConfig& feature_config);
 
  private:
   // The current configurations.
   ConfigMap configs_;
 
   DISALLOW_COPY_AND_ASSIGN(EditableConfiguration);
 };
 
 }  // namespace feature_engagement_tracker
 
 #endif  // COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_EDITABLE_CONFIGURATION_H_