Allow signin to continue even if sync is disabled by policy.

chrome/browser/signin/about_signin_internals.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/signin/about_signin_internals.h"
 
 #include "base/debug/trace_event.h"
 #include "base/hash.h"
 #include "base/i18n/time_formatting.h"
 #include "base/logging.h"
@@ skipping 186 matching lines @@
 
   RefreshSigninPrefs();
 
   SigninManagerFactory::GetForProfile(profile)->
       AddSigninDiagnosticsObserver(this);
   TokenServiceFactory::GetForProfile(profile)->
       AddSigninDiagnosticsObserver(this);
 }
 
 void AboutSigninInternals::Shutdown() {
-  SigninManagerFactory::GetForProfile(profile_)->
+  SigninManager* signin = SigninManagerFactory::GetForProfile(profile_)->
       RemoveSigninDiagnosticsObserver(this);
-  TokenServiceFactory::GetForProfile(profile_)->
+  TokenService* token = TokenServiceFactory::GetForProfile(profile_)->
       RemoveSigninDiagnosticsObserver(this);
 }
 
 void AboutSigninInternals::NotifyObservers() {
   FOR_EACH_OBSERVER(AboutSigninInternals::Observer,
                     signin_observers_,
                     OnSigninStateChanged(signin_status_.ToValue()));
 }
 
 scoped_ptr<DictionaryValue> AboutSigninInternals::GetSigninStatus() {
   return signin_status_.ToValue().Pass();
 }