ChromeOS: implement per-user time zone preferences.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index b1d2ffa4de691f8e03a022c795c56ce6b9efd7f3..e900198ff3109c4843f68c91db305699bcdf38b8 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -522,6 +522,9 @@ const char kVoiceInteractionLocales[] = "voice-interaction-supported-locales";
 const char kEnterpriseEnableLicenseTypeSelection[] =
     "enterprise-enable-license-type-selection";
 
+// Disables per-user timezone.
+const char kDisablePerUserTimezone[] = "disable-per-user-timezone";
+
 bool WakeOnWifiEnabled() {
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(kDisableWakeOnWifi);
 }