1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef COMPONENTS_METRICS_METRICS_SERVICE_OBSERVER_H_ 6 #define COMPONENTS_METRICS_METRICS_SERVICE_OBSERVER_H_ 7 8 #include "base/macros.h" 9 10 // MetricsServiceObserver receives notifications from MetricsService. 11 // An observer must be added, removed, and notified on the same thread. 12 class MetricsServiceObserver { 13 public: 14 // Called when a new MetricsLog is created. 15 virtual void OnDidCreateMetricsLog() = 0; 16 17 protected: 18 MetricsServiceObserver(); 19 virtual ~MetricsServiceObserver(); 20 21 private: 22 DISALLOW_COPY_AND_ASSIGN(MetricsServiceObserver); 23 }; 24 25 #endif // COMPONENTS_METRICS_METRICS_SERVICE_OBSERVER_H_ 26