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

ash/system/chromeos/system_clock_observer.cc

 // Copyright 2013 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 "ash/system/chromeos/system_clock_observer.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 
 namespace ash {
 
 SystemClockObserver::SystemClockObserver() {
   chromeos::DBusThreadManager::Get()->GetSystemClockClient()
       ->AddObserver(this);
   chromeos::system::TimezoneSettings::GetInstance()->AddObserver(this);
 }
 
 SystemClockObserver::~SystemClockObserver() {
   chromeos::DBusThreadManager::Get()->GetSystemClockClient()
       ->RemoveObserver(this);
   chromeos::system::TimezoneSettings::GetInstance()->RemoveObserver(this);
 }
 
 void SystemClockObserver::SystemClockUpdated() {
   Shell::GetInstance()->system_tray_notifier()
       ->NotifySystemClockTimeUpdated();
 }
 
+void SystemClockObserver::SystemClockCanSetTimeChanged(bool can_set_time) {
+  Shell::GetInstance()->system_tray_notifier()
+      ->NotifySystemClockCanSetTimeChanged(can_set_time);
+}
+
 void SystemClockObserver::TimezoneChanged(const icu::TimeZone& timezone) {
   Shell::GetInstance()->system_tray_notifier()->NotifyRefreshClock();
 }
 
+bool SystemClockObserver::SystemClockCanSetTime() {
+  return chromeos::DBusThreadManager::Get()
+      ->GetSystemClockClient()->CanSetTime();

[stevenjb, 2014/04/25 22:53:31]

nit: I think it would be a little nicer / more clear if we cached can_set_time_
in this class, set it in the constructor, update it in
SystemClockCanSetTimeChanged, and return it in a trivial can_set_time() accessor
instead of calling into SystemClockClient() here. 

[michaelpg, 2014/04/25 23:50:29]

Done.

+}
+
 }  // namespace ash