Properly handle disabling sync via the google dashboard.

chrome/browser/policy/user_policy_signin_service.h

Index: chrome/browser/policy/user_policy_signin_service.h
diff --git a/chrome/browser/policy/user_policy_signin_service.h b/chrome/browser/policy/user_policy_signin_service.h
index 1dca276f93e7977e5c10956a175c5c4371e60048..1e0f4a2bb0c60b5ee480317cd996141ac6dc9268 100644
--- a/chrome/browser/policy/user_policy_signin_service.h
+++ b/chrome/browser/policy/user_policy_signin_service.h
@@ -104,6 +104,10 @@ class UserPolicySigninService
   // 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();