Properly handle disabling sync via the google dashboard.

chrome/browser/policy/user_policy_signin_service.h

 // 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/callback.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 86 matching lines @@
 
   // Fetches an OAuth token to allow the cloud policy service to register with
   // the cloud policy server. |oauth_login_token| should contain an OAuth login
   // refresh token that can be downscoped to get an access token for the
   // device_management service.
   void RegisterCloudPolicyService(std::string oauth_login_token);
 
   // Callback invoked when policy registration has finished.
   void OnRegistrationComplete();
 
+  // Helper routine which prohibits user signout if the user is registered for
+  // cloud policy.
+  void ProhibitSignoutIfNeeded();
+
   // Helper routines to (un)register for CloudPolicyService and
   // CloudPolicyClient notifications.
   void StartObserving();
   void StopObserving();
 
   // Shuts down the UserCloudPolicyManager (for example, after the user signs
   // out) and deletes any cached policy.
   void ShutdownUserCloudPolicyManager();
 
   // Invoked when a policy registration request is complete.
   void CallPolicyRegistrationCallback(scoped_ptr<CloudPolicyClient> client,
                                       PolicyRegistrationCallback callback);
 
   // Convenience helper to get the UserCloudPolicyManager for |profile_|.
   UserCloudPolicyManager* GetManager();
 
   // Weak pointer to the profile this service is associated with.
   Profile* profile_;
 
   content::NotificationRegistrar registrar_;
 
   scoped_ptr<CloudPolicyClientRegistrationHelper> registration_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(UserPolicySigninService);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_USER_POLICY_SIGNIN_SERVICE_H_