Merge histograms from providers into StatisticsRecorder for display.

components/metrics/metrics_service.cc

 // 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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It is
@@ skipping 554 matching lines @@
                                              int message_size,
                                              bool is_cellular) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (data_use_tracker_) {
     data_use_tracker_->UpdateMetricsUsagePrefs(service_name,
                                                message_size,
                                                is_cellular);
   }
 }
 
-void MetricsService::MergeHistogramDeltas() {
-  for (MetricsProvider* provider : metrics_providers_)
-    provider->MergeHistogramDeltas();
-}
-
 //------------------------------------------------------------------------------
 // private methods
 //------------------------------------------------------------------------------
 
 
 //------------------------------------------------------------------------------
 // Initialization methods
 
 void MetricsService::InitializeMetricsState() {
   const int64_t buildtime = MetricsLog::GetBuildTime();
@@ skipping 677 matching lines @@
   // Redundant setting to assure that we always reset this value at shutdown
   // (and that we don't use some alternate path, and not call LogCleanShutdown).
   clean_shutdown_status_ = CLEANLY_SHUTDOWN;
   client_->OnLogCleanShutdown();
   clean_exit_beacon_.WriteBeaconValue(true);
   SetExecutionPhase(MetricsService::SHUTDOWN_COMPLETE, local_state_);
   local_state_->SetBoolean(prefs::kStabilitySessionEndCompleted, end_completed);
 }
 
 }  // namespace metrics