Add a SigninAllowed policy.

chrome/browser/signin/signin_manager_fake.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/signin_manager_fake.h"
 
+#include "base/callback_helpers.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/signin_global_error.h"
 #include "chrome/browser/ui/global_error/global_error_service.h"
 #include "chrome/browser/ui/global_error/global_error_service_factory.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_service.h"
 
 FakeSigninManager::FakeSigninManager(Profile* profile)
     : auth_in_progress_(false) {
   profile_ = profile;
   signin_global_error_.reset(new SigninGlobalError(this, profile));
   GlobalErrorServiceFactory::GetForProfile(profile_)->AddGlobalError(
       signin_global_error_.get());
+  signin_allowed_.Init(prefs::kSigninAllowed, profile_->GetPrefs(),
+                       base::Bind(&SigninManager::OnSigninAllowedPrefChanged,
+                                  base::Unretained(this)));
 }
 
 FakeSigninManager::~FakeSigninManager() {
   if (signin_global_error_.get()) {
     GlobalErrorServiceFactory::GetForProfile(profile_)->RemoveGlobalError(
         signin_global_error_.get());
     signin_global_error_.reset();
   }
 }
 
@@ skipping 33 matching lines @@
 }
 
 bool FakeSigninManager::AuthInProgress() const {
   return auth_in_progress_;
 }
 
 // static
 ProfileKeyedService* FakeSigninManager::Build(Profile* profile) {
   return new FakeSigninManager(profile);
 }