PART1: Initiated the SignedSettings refactoring.

chrome/browser/ui/webui/options/chromeos/system_options_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/system_options_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/system_options_handler.cc b/chrome/browser/ui/webui/options/chromeos/system_options_handler.cc
index 362fa82b08ba652ce73d3402c530f0d04eb8b0cc..44792a8e527daffff343090520bf42751b58ca11 100644
--- a/chrome/browser/ui/webui/options/chromeos/system_options_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/system_options_handler.cc
@@ -17,6 +17,7 @@
 #include "content/common/json_value_serializer.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/accessibility_util.h"
+#include "chrome/browser/chromeos/cros_settings.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ -33,9 +34,7 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
-SystemOptionsHandler::SystemOptionsHandler()
-    : chromeos::CrosOptionsPageUIHandler(
-        new chromeos::SystemSettingsProvider()) {
+SystemOptionsHandler::SystemOptionsHandler() {
 }
 
 SystemOptionsHandler::~SystemOptionsHandler() {
@@ -90,9 +89,12 @@ void SystemOptionsHandler::GetLocalizedValues(
       l10n_util::GetStringUTF16(
           IDS_OPTIONS_SETTINGS_ACCESSIBILITY_DESCRIPTION));
 
+  // TODO(pastarmovj): replace this with a call to the CrosSettings list
+  // handling functionality to come.
   localized_strings->Set("timezoneList",
-      reinterpret_cast<chromeos::SystemSettingsProvider*>(
-          settings_provider_.get())->GetTimezoneList());
+      static_cast<chromeos::SystemSettingsProvider*>(
+          chromeos::CrosSettings::Get()->GetProvider(
+              chromeos::kSystemTimezone))->GetTimezoneList());
 }
 
 void SystemOptionsHandler::Initialize() {