signin: pull basic SigninManager functionality into new SigninManagerBase class.

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 "base/basictypes.h"
@@ skipping 1153 matching lines @@
 scoped_ptr<DictionaryValue> BrowserOptionsHandler::GetSyncStateDictionary() {
   scoped_ptr<DictionaryValue> sync_status(new DictionaryValue);
   Profile* profile = Profile::FromWebUI(web_ui());
   if (profile->IsGuestSession()) {
     // Cannot display signin status when running in guest mode on chromeos
     // because there is no SigninManager.
     sync_status->SetBoolean("signinAllowed", false);
     return sync_status.Pass();
   }
 
+  bool signout_prohibited = false;
+#if !defined(OS_CHROMEOS)
   // Signout is not allowed if the user has policy (crbug.com/172204).
-  SigninManager* signin = SigninManagerFactory::GetForProfile(profile);
-  DCHECK(signin);
-  sync_status->SetBoolean("signoutAllowed", !signin->IsSignoutProhibited());
+  signout_prohibited =
+      SigninManagerFactory::GetForProfile(profile)->IsSignoutProhibited();
+#endif
+
   ProfileSyncService* service(
       ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile));
+  SigninManagerBase* signin = service->signin();
+  sync_status->SetBoolean("signoutAllowed", !signout_prohibited);
   sync_status->SetBoolean("signinAllowed", signin->IsSigninAllowed());
   sync_status->SetBoolean("syncSystemEnabled", !!service);
   sync_status->SetBoolean("setupCompleted",
                           service && service->HasSyncSetupCompleted());
   sync_status->SetBoolean("setupInProgress",
       service && !service->IsManaged() && service->FirstSetupInProgress());
 
   string16 status_label;
   string16 link_label;
   DCHECK(signin);
@@ skipping 341 matching lines @@
   base::FundamentalValue disabled(profile_pref_registrar_.IsManaged() ||
                                   is_extension_controlled);
   base::FundamentalValue extension_controlled(is_extension_controlled);
   web_ui()->CallJavascriptFunction("BrowserOptions.setupProxySettingsSection",
                                    disabled, extension_controlled);
 
 #endif  // !defined(OS_CHROMEOS)
 }
 
 }  // namespace options