Add IsAuthenticated() method to SigninManager.

chrome/browser/ui/webui/options/browser_options_handler.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 "chrome/browser/ui/webui/options/browser_options_handler.h"
 
 #include <string>
 #include <vector>
 
 #include "apps/app_window.h"
@@ skipping 1371 matching lines @@
   base::string16 status_label;
   base::string16 link_label;
   bool status_has_error = sync_ui_util::GetStatusLabels(
       service, *signin, sync_ui_util::WITH_HTML, &status_label, &link_label) ==
           sync_ui_util::SYNC_ERROR;
   sync_status->SetString("statusText", status_label);
   sync_status->SetString("actionLinkText", link_label);
   sync_status->SetBoolean("hasError", status_has_error);
 
   sync_status->SetBoolean("managed", service && service->IsManaged());
-  sync_status->SetBoolean("signedIn",
-                          !signin->GetAuthenticatedUsername().empty());
+  sync_status->SetBoolean("signedIn", signin->IsAuthenticated());
   sync_status->SetBoolean("hasUnrecoverableError",
                           service && service->HasUnrecoverableError());
 
   return sync_status.Pass();
 }
 
 void BrowserOptionsHandler::HandleSelectDownloadLocation(
     const base::ListValue* args) {
   PrefService* pref_service = Profile::FromWebUI(web_ui())->GetPrefs();
   select_folder_dialog_ = ui::SelectFileDialog::Create(
@@ skipping 459 matching lines @@
   extension = extensions::GetExtensionOverridingProxy(
       Profile::FromWebUI(web_ui()));
   AppendExtensionData("proxy", extension, &extension_controlled);
 
   web_ui()->CallJavascriptFunction("BrowserOptions.toggleExtensionIndicators",
                                    extension_controlled);
 #endif  // defined(OS_WIN)
 }
 
 }  // namespace options