Create Ukm ReportingService implementation.

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 186 matching lines @@
 // static
 MetricsService::ShutdownCleanliness MetricsService::clean_shutdown_status_ =
     MetricsService::CLEANLY_SHUTDOWN;
 
 // static
 void MetricsService::RegisterPrefs(PrefRegistrySimple* registry) {
   CleanExitBeacon::RegisterPrefs(registry);
   MetricsStateManager::RegisterPrefs(registry);
   MetricsLog::RegisterPrefs(registry);
   StabilityMetricsProvider::RegisterPrefs(registry);
-  DataUseTracker::RegisterPrefs(registry);
   ExecutionPhaseManager::RegisterPrefs(registry);
+  MetricsReportingService::RegisterPrefs(registry);
 
   registry->RegisterInt64Pref(prefs::kInstallDate, 0);
 
   registry->RegisterIntegerPref(prefs::kMetricsSessionID, -1);
 
-  registry->RegisterListPref(prefs::kMetricsInitialLogs);
-  registry->RegisterListPref(prefs::kMetricsOngoingLogs);
-
   registry->RegisterInt64Pref(prefs::kUninstallLaunchCount, 0);
   registry->RegisterInt64Pref(prefs::kUninstallMetricsUptimeSec, 0);
 }
 
 MetricsService::MetricsService(MetricsStateManager* state_manager,
                                MetricsServiceClient* client,
                                PrefService* local_state)
     : reporting_service_(client, local_state),
       histogram_snapshot_manager_(this),
       state_manager_(state_manager),
@@ skipping 769 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(ExecutionPhase::SHUTDOWN_COMPLETE, local_state_);
   StabilityMetricsProvider(local_state_).MarkSessionEndCompleted(end_completed);
 }
 
 }  // namespace metrics