Add IsAuthenticated() method to SigninManager.

chrome/browser/signin/signin_promo.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/signin/signin_promo.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 81 matching lines @@
     return false;
 
   // Don't show for supervised profiles.
   if (profile->IsSupervised())
     return false;
 
   // Display the signin promo if the user is not signed in.
   SigninManager* signin = SigninManagerFactory::GetForProfile(
       profile->GetOriginalProfile());
   return !signin->AuthInProgress() && signin->IsSigninAllowed() &&
-      signin->GetAuthenticatedUsername().empty();
+      !signin->IsAuthenticated();
 #endif
 }
 
 bool ShouldShowPromoAtStartup(Profile* profile, bool is_new_profile) {
   DCHECK(profile);
 
   // Don't show if the profile is an incognito.
   if (profile->IsOffTheRecord())
     return false;
 
@@ skipping 214 matching lines @@
       prefs::kSignInPromoShowOnFirstRunAllowed,
       true,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterBooleanPref(
       prefs::kSignInPromoShowNTPBubble,
       false,
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 }  // namespace signin