Add IsAuthenticated() method to SigninManager.

chrome/browser/local_discovery/privet_notifications.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 "chrome/browser/local_discovery/privet_notifications.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
@@ skipping 279 matching lines @@
   g_browser_process->notification_ui_manager()->CancelById(
       kPrivetNotificationID);
 }
 
 void PrivetNotificationService::Start() {
 #if defined(CHROMEOS)
   SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfileIfExists(
           Profile::FromBrowserContext(profile_));
 
-  if (!signin_manager || signin_manager->GetAuthenticatedUsername().empty())
+  if (!signin_manager || !signin_manager->IsAuthenticated())
     return;
 #endif
 
   enable_privet_notification_member_.Init(
       prefs::kLocalDiscoveryNotificationsEnabled,
       Profile::FromBrowserContext(profile_)->GetPrefs(),
       base::Bind(&PrivetNotificationService::OnNotificationsEnabledChanged,
                  base::Unretained(this)));
   OnNotificationsEnabledChanged();
 }
@@ skipping 96 matching lines @@
 
 void PrivetNotificationDelegate::DisableNotifications() {
   Profile* profile_obj = Profile::FromBrowserContext(profile_);
 
   profile_obj->GetPrefs()->SetBoolean(
       prefs::kLocalDiscoveryNotificationsEnabled,
       false);
 }
 
 }  // namespace local_discovery