Add IsAuthenticated() method to SigninManager.

chrome/browser/ui/webui/options/options_ui_browsertest.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/options_ui_browsertest.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/scoped_observer.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 267 matching lines @@
 
   SignOutWaiter sign_out_waiter(signin);
 
   ASSERT_TRUE(content::ExecuteScript(
       browser()->tab_strip_model()->GetActiveWebContents(),
       "$('stop-syncing-ok').click();"));
 
   sign_out_waiter.Wait();
 
   EXPECT_TRUE(browser()->profile()->GetProfileName() != user);
-  EXPECT_TRUE(signin->GetAuthenticatedUsername().empty());
+  EXPECT_FALSE(signin->IsAuthenticated());
 }
 
 // Regression test for http://crbug.com/301436, excluded on Chrome OS because
 // profile management in the settings UI exists on desktop platforms only.
 IN_PROC_BROWSER_TEST_F(OptionsUIBrowserTest, NavigateBackFromOverlayDialog) {
   NavigateToSettingsFrame();
 
   // Click a button that opens an overlay dialog.
   content::WebContents* contents =
       browser()->tab_strip_model()->GetActiveWebContents();
@@ skipping 31 matching lines @@
   run_loop.Run();
 
   // Verify that the settings page has updated and lists two profiles.
   ASSERT_TRUE(content::ExecuteScriptAndExtractInt(
       contents, javascript, &profiles));
   EXPECT_EQ(2, profiles);
 }
 #endif
 
 }  // namespace options