Gather stability prefs into managing objects.

components/metrics/clean_exit_beacon.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.
 
 #include "components/metrics/clean_exit_beacon.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "components/metrics/metrics_pref_names.h"
+#include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 
 #if defined(OS_WIN)
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/registry.h"
 #endif
 
 namespace metrics {
 
@@ skipping 35 matching lines @@
   }
 
   UMA_HISTOGRAM_ENUMERATION(
       "UMA.CleanExitBeaconConsistency", consistency, NUM_CONSISTENCY_ENUMS);
 #endif
 }
 
 CleanExitBeacon::~CleanExitBeacon() {
 }
 
+// static
+void CleanExitBeacon::RegisterPrefs(PrefRegistrySimple* registry) {
+  registry->RegisterBooleanPref(prefs::kStabilityExitedCleanly, true);
+}
+
 void CleanExitBeacon::WriteBeaconValue(bool value) {
   local_state_->SetBoolean(prefs::kStabilityExitedCleanly, value);
 
 #if defined(OS_WIN)
   base::win::RegKey regkey;
   if (regkey.Create(HKEY_CURRENT_USER,
                     backup_registry_key_.c_str(),
                     KEY_ALL_ACCESS) == ERROR_SUCCESS) {
     regkey.WriteValue(
         base::ASCIIToUTF16(prefs::kStabilityExitedCleanly).c_str(),
         value ? 1u : 0u);
   }
 #endif
 }
 
 }  // namespace metrics