Reverting this as it causes browser tests on the Linux ChromiumOS builder to fail.

chrome/browser/policy/user_policy_signin_service.h

Index: chrome/browser/policy/user_policy_signin_service.h
===================================================================
--- chrome/browser/policy/user_policy_signin_service.h	(revision 150390)
+++ chrome/browser/policy/user_policy_signin_service.h	(working copy)
@@ -1,73 +0,0 @@
-// 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_H_
-#define CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/profiles/profile_keyed_service.h"
-#include "chrome/common/net/gaia/oauth2_access_token_consumer.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-class OAuth2AccessTokenFetcher;
-class Profile;
-
-namespace base {
-class Time;
-}
-
-namespace policy {
-
-class UserCloudPolicyManager;
-
-// The UserPolicySigninService tracks when user signin/signout actions occur and
-// initializes/shuts down the UserCloudPolicyManager as required. This class is
-// not used on ChromeOS because UserCloudPolicyManager initialization is handled
-// via LoginUtils, since it must happen before profile creation.
-class UserPolicySigninService
-    : public ProfileKeyedService,
-      public OAuth2AccessTokenConsumer,
-      public content::NotificationObserver {
- public:
-  // Creates a UserPolicySigninService associated with the passed |profile|.
-  UserPolicySigninService(Profile* profile, UserCloudPolicyManager* manager);
-  virtual ~UserPolicySigninService();
-
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
-  // OAuth2AccessTokenConsumer implementation.
-  virtual void OnGetTokenSuccess(const std::string& access_token,
-                                 const base::Time& expiration_time) OVERRIDE;
-  virtual void OnGetTokenFailure(const GoogleServiceAuthError& error) OVERRIDE;
-
- private:
-  // Initializes the UserCloudPolicyManager to reflect the currently-signed-in
-  // user.
-  void ConfigureUserCloudPolicyManager();
-
-  // Fetches an OAuth token to allow the cloud policy service to register with
-  // the cloud policy server.
-  void RegisterCloudPolicyService();
-
-  // Weak pointer to the profile this service is associated with.
-  Profile* profile_;
-
-  content::NotificationRegistrar registrar_;
-  scoped_ptr<OAuth2AccessTokenFetcher> oauth2_access_token_fetcher_;
-
-  // Weak pointer to the UserCloudPolicyManager (allows dependency injection
-  // for tests).
-  UserCloudPolicyManager* manager_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserPolicySigninService);
-};
-
-}  // namespace policy
-
-#endif  // CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_H_