Do not use empty callback when cleaning up managed users

TBR=nkostylev@chromium.org
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/16104006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202425 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/login/user_manager_impl.cc

@@ -1418,7 +1418,7 @@ void UserManagerImpl::RollbackLocallyManagedUserCreationTransaction() {
   RemoveNonCryptohomeData(user_id);
 
   cryptohome::AsyncMethodCaller::GetInstance()->AsyncRemove(
-      user_id, base::Callback<void(bool, cryptohome::MountError)>());
+      user_id, base::Bind(&OnRemoveUserComplete, user_id));
 
   prefs->ClearPref(kLocallyManagedUserCreationTransactionDisplayName);
   prefs->ClearPref(kLocallyManagedUserCreationTransactionUserId);