Add support for loading user cloud policy on desktop.

chrome/browser/policy/user_policy_signin_service_factory.h

Index: chrome/browser/policy/user_policy_signin_service_factory.h
diff --git a/chrome/browser/policy/user_policy_signin_service_factory.h b/chrome/browser/policy/user_policy_signin_service_factory.h
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+++ b/chrome/browser/policy/user_policy_signin_service_factory.h
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+// 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.
+
+#ifndef CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+
+namespace policy {
+
+class UserPolicySigninService;
+
+// Singleton that owns all UserPolicySigninServices and creates/deletes them as
+// new Profiles are created/shutdown.
+class UserPolicySigninServiceFactory : public ProfileKeyedServiceFactory {
+ public:
+  // Returns an instance of the UserPolicySigninServiceFactory singleton.
+  static UserPolicySigninServiceFactory* GetInstance();
+
+  // Returns the instance of UserPolicySigninService for the passed |profile|.
+  // Used primarily for testing.
+  static UserPolicySigninService* GetForProfile(Profile* profile);
+
+ protected:
+  // ProfileKeyedServiceFactory implementation.
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+
+  // Overridden to cause this object to be created when the profile is created.
+  virtual bool ServiceIsCreatedWithProfile() OVERRIDE;
+
+  // Register the preferences related to cloud-based user policy.
+  virtual void RegisterUserPrefs(PrefService* user_prefs) OVERRIDE;
+
+ private:
+  friend struct DefaultSingletonTraits<UserPolicySigninServiceFactory>;
+
+  UserPolicySigninServiceFactory();
+  virtual ~UserPolicySigninServiceFactory();
+
+  DISALLOW_COPY_AND_ASSIGN(UserPolicySigninServiceFactory);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_FACTORY_H_