Timezone auto update option should be available by default.

chrome/browser/ui/webui/options/browser_options_handler.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/ui/webui/options/browser_options_handler.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 663 matching lines @@
                      base::CommandLine::ForCurrentProcess()->HasSwitch(
                          switches::kEnableWebsiteSettingsManager));
 
   values->SetBoolean("usingNewProfilesUI", switches::IsNewAvatarMenu());
 
 #if defined(OS_CHROMEOS)
   values->SetBoolean(
       "showWakeOnWifi",
       chromeos::WakeOnWifiManager::Get()->WakeOnWifiSupported() &&
       chromeos::switches::WakeOnWifiEnabled());
-  const bool have_enable_time_zone_tracking_option_switch =
+  const bool have_disable_time_zone_tracking_option_switch =
       base::CommandLine::ForCurrentProcess()->HasSwitch(
-          chromeos::switches::kEnableTimeZoneTrackingOption);
+          chromeos::switches::kDisableTimeZoneTrackingOption);
   values->SetBoolean("enableTimeZoneTrackingOption",
-                     have_enable_time_zone_tracking_option_switch &&
+                     !have_disable_time_zone_tracking_option_switch &&
                          !chromeos::system::HasSystemTimezonePolicy());
 #endif
 }
 
 #if defined(ENABLE_PRINT_PREVIEW)
 void BrowserOptionsHandler::RegisterCloudPrintValues(
     base::DictionaryValue* values) {
   values->SetString("cloudPrintOptionLabel",
                     l10n_util::GetStringFUTF16(
                         IDS_CLOUD_PRINT_CHROMEOS_OPTION_LABEL,
@@ skipping 1430 matching lines @@
 void BrowserOptionsHandler::OnPolicyUpdated(const policy::PolicyNamespace& ns,
                                             const policy::PolicyMap& previous,
                                             const policy::PolicyMap& current) {
   std::set<std::string> different_keys;
   current.GetDifferingKeys(previous, &different_keys);
   if (ContainsKey(different_keys, policy::key::kMetricsReportingEnabled))
     SetupMetricsReportingCheckbox();
 }
 
 }  // namespace options