Make MetricsService save compressed logs to local state.

chrome/browser/metrics/metrics_service.cc

 // Copyright (c) 2012 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 302 matching lines @@
   registry->RegisterStringPref(prefs::kStabilityStatsVersion, std::string());
   registry->RegisterInt64Pref(prefs::kStabilityStatsBuildTime, 0);
   registry->RegisterBooleanPref(prefs::kStabilityExitedCleanly, true);
   registry->RegisterIntegerPref(prefs::kStabilityExecutionPhase,
                                 UNINITIALIZED_PHASE);
   registry->RegisterBooleanPref(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(prefs::kInstallDate, 0);
   registry->RegisterInt64Pref(prefs::kUninstallLaunchCount, 0);
   registry->RegisterInt64Pref(prefs::kUninstallMetricsUptimeSec, 0);
   registry->RegisterInt64Pref(prefs::kUninstallLastLaunchTimeSec, 0);
   registry->RegisterInt64Pref(prefs::kUninstallLastObservedRunTimeSec, 0);
 
   // TODO(asvitkine): Move this out of here.
   ChromeStabilityMetricsProvider::RegisterPrefs(registry);
 
@@ skipping 979 matching lines @@
   local_state_->SetBoolean(path, value);
   RecordCurrentState(local_state_);
 }
 
 void MetricsService::RecordCurrentState(PrefService* pref) {
   pref->SetInt64(prefs::kStabilityLastTimestampSec, Time::Now().ToTimeT());
 
   for (size_t i = 0; i < metrics_providers_.size(); ++i)
     metrics_providers_[i]->RecordCurrentState();
 }