Date and Time dialog for when the clock isn't synced.

ash/system/tray/system_tray_notifier.cc

Index: ash/system/tray/system_tray_notifier.cc
diff --git a/ash/system/tray/system_tray_notifier.cc b/ash/system/tray/system_tray_notifier.cc
index 3adafe12f01e6b220086c8489df9f7330239e0dd..ed858c3f9fb3ea1290c24c00d5ff56c2649b570e 100644
--- a/ash/system/tray/system_tray_notifier.cc
+++ b/ash/system/tray/system_tray_notifier.cc
@@ -260,6 +260,12 @@ void SystemTrayNotifier::NotifySystemClockTimeUpdated() {
                     OnSystemClockTimeUpdated());
 }
 
+void SystemTrayNotifier::NotifySystemClockCanSetTimeChanged(bool can_set_time) {
+  FOR_EACH_OBSERVER(ClockObserver,
+                    clock_observers_,
+                    OnSystemClockCanSetTimeChanged(can_set_time));
+}
+
 void SystemTrayNotifier::NotifyDriveJobUpdated(
     const DriveOperationStatus& status) {
   FOR_EACH_OBSERVER(DriveObserver,