Revert 154457 - Switch from SignedSettings to DeviceSettingsService.

chrome/browser/chromeos/settings/system_settings_provider.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.
 
 #include "chrome/browser/chromeos/settings/system_settings_provider.h"
 
 #include "base/string16.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
@@ skipping 42 matching lines @@
 // The timezone is always trusted.
 CrosSettingsProvider::TrustedStatus
     SystemSettingsProvider::PrepareTrustedValues(const base::Closure& cb) {
   return TRUSTED;
 }
 
 bool SystemSettingsProvider::HandlesSetting(const std::string& path) const {
   return path == kSystemTimezone;
 }
 
+void SystemSettingsProvider::Reload() {
+  // TODO(pastarmovj): We can actually cache the timezone here to make returning
+  // it faster.
+}
+
 void SystemSettingsProvider::TimezoneChanged(const icu::TimeZone& timezone) {
   // Fires system setting change notification.
   timezone_value_.reset(base::Value::CreateStringValue(
       system::TimezoneSettings::GetTimezoneID(timezone)));
   NotifyObservers(kSystemTimezone);
 }
 
 }  // namespace chromeos