Implements the dialog view for logout button tray in public sessions.

ash/system/tray/system_tray_notifier.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 "ash/system/tray/system_tray_notifier.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/system/chromeos/network/network_state_notifier.h"
 #endif
 
@@ skipping 214 matching lines @@
                     ime_observers_,
                     OnIMERefresh(show_message));
 }
 
 void SystemTrayNotifier::NotifyShowLoginButtonChanged(bool show_login_button) {
   FOR_EACH_OBSERVER(LogoutButtonObserver,
                     logout_button_observers_,
                     OnShowLogoutButtonInTrayChanged(show_login_button));
 }
 
+void SystemTrayNotifier::NotifyLogoutDialogDurationChanged(
+    base::TimeDelta duration) {
+  FOR_EACH_OBSERVER(LogoutButtonObserver,
+                    logout_button_observers_,
+                    OnLogoutDialogDurationChanged(duration));
+}
+
 void SystemTrayNotifier::NotifyLocaleChanged(
     LocaleObserver::Delegate* delegate,
     const std::string& cur_locale,
     const std::string& from_locale,
     const std::string& to_locale) {
   FOR_EACH_OBSERVER(
       LocaleObserver,
       locale_observers_,
       OnLocaleChanged(delegate, cur_locale, from_locale, to_locale));
 }
@@ skipping 62 matching lines @@
 }
 
 void SystemTrayNotifier::NotifyScreenShareStop() {
   FOR_EACH_OBSERVER(ScreenShareObserver, screen_share_observers_,
                     OnScreenShareStop());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash