Make MetricsService save compressed logs to local state.

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 282 matching lines @@
   registry->RegisterInt64Pref(metrics::prefs::kStabilityStatsBuildTime, 0);
   registry->RegisterBooleanPref(metrics::prefs::kStabilityExitedCleanly, true);
   registry->RegisterIntegerPref(metrics::prefs::kStabilityExecutionPhase,
                                 UNINITIALIZED_PHASE);
   registry->RegisterBooleanPref(metrics::prefs::kStabilitySessionEndCompleted,
                                 true);
   registry->RegisterIntegerPref(metrics::prefs::kMetricsSessionID, -1);
 
   registry->RegisterListPref(metrics::prefs::kMetricsInitialLogs);
   registry->RegisterListPref(metrics::prefs::kMetricsOngoingLogs);
+  registry->RegisterListPref(metrics::prefs::kMetricsInitialLogsOld);
+  registry->RegisterListPref(metrics::prefs::kMetricsOngoingLogsOld);
 
   registry->RegisterInt64Pref(metrics::prefs::kUninstallLaunchCount, 0);
   registry->RegisterInt64Pref(metrics::prefs::kUninstallMetricsUptimeSec, 0);
 }
 
 MetricsService::MetricsService(metrics::MetricsStateManager* state_manager,
                                metrics::MetricsServiceClient* client,
                                PrefService* local_state)
     : log_manager_(local_state, kUploadLogAvoidRetransmitSize),
       histogram_snapshot_manager_(this),
@@ skipping 882 matching lines @@
   RecordCurrentState(local_state_);
 }
 
 void MetricsService::RecordCurrentState(PrefService* pref) {
   pref->SetInt64(metrics::prefs::kStabilityLastTimestampSec,
                  Time::Now().ToTimeT());
 
   for (size_t i = 0; i < metrics_providers_.size(); ++i)
     metrics_providers_[i]->RecordCurrentState();
 }