ChromeOS: implement per-user time zone preferences.

chrome/browser/chromeos/login/wizard_controller.cc

Index: chrome/browser/chromeos/login/wizard_controller.cc
diff --git a/chrome/browser/chromeos/login/wizard_controller.cc b/chrome/browser/chromeos/login/wizard_controller.cc
index f826f99da2db6fb7edbe1e41481412251ae476d5..42085c0b3188bc687347f02145b7cf548c0e9f9b 100644
--- a/chrome/browser/chromeos/login/wizard_controller.cc
+++ b/chrome/browser/chromeos/login/wizard_controller.cc
@@ -67,6 +67,7 @@
 #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/system/device_disabling_manager.h"
+#include "chrome/browser/chromeos/system/timezone_util.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/metrics/metrics_reporting_state.h"
 #include "chrome/browser/profiles/profile.h"
@@ -1501,9 +1502,7 @@ void WizardController::OnTimezoneResolved(
   if (!timezone->timeZoneId.empty()) {
     VLOG(1) << "Resolve TimeZone: setting timezone to '" << timezone->timeZoneId
             << "'";
-
-    system::TimezoneSettings::GetInstance()->SetTimezoneFromID(
-        base::UTF8ToUTF16(timezone->timeZoneId));
+    chromeos::system::SetSystemAndSigninScreenTimezone(timezone->timeZoneId);
   }
 }