Merge histograms from providers into StatisticsRecorder for display.

components/metrics/metrics_service.h

 // Copyright 2014 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.
 
 // This file defines a service that collects information about the user
 // experience in order to help improve future versions of the app.
 
 #ifndef COMPONENTS_METRICS_METRICS_SERVICE_H_
 #define COMPONENTS_METRICS_METRICS_SERVICE_H_
 
@@ skipping 191 matching lines @@
   void ClearSavedStabilityMetrics();
 
   // Pushes a log that has been generated by an external component.
   void PushExternalLog(const std::string& log);
 
   // Updates data usage tracking prefs with the specified values.
   void UpdateMetricsUsagePrefs(const std::string& service_name,
                                int message_size,
                                bool is_cellular);
 
-  // Merge any data from metrics providers into the global StatisticsRecorder.
-  void MergeHistogramDeltas();
-
  protected:
   // Exposed for testing.
   MetricsLogManager* log_manager() { return &log_manager_; }
 
  private:
   friend class MetricsServiceAccessor;
 
   // The MetricsService has a lifecycle that is stored as a state.
   // See metrics_service.cc for description of this lifecycle.
   enum State {
@@ skipping 252 matching lines @@
   // Weak pointers factory used to post task on different threads. All weak
   // pointers managed by this factory have the same lifetime as MetricsService.
   base::WeakPtrFactory<MetricsService> self_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsService);
 };
 
 }  // namespace metrics
 
 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_H_