Enable lock even when no password hash is present.

chrome/browser/signin/local_auth.h

 // Copyright 2013 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.
 //
 // The local-auth module allows for user authentication in the case when
 // on-line authentication is not possible (e.g. there is no network
 // connection).
 
 #ifndef CHROME_BROWSER_SIGNIN_LOCAL_AUTH_H_
 #define CHROME_BROWSER_SIGNIN_LOCAL_AUTH_H_
@@ skipping 15 matching lines @@
 
 void SetLocalAuthCredentials(const Profile* profile,
                              const std::string& password);
 
 bool ValidateLocalAuthCredentials(size_t profile_info_index,
                                   const std::string& password);
 
 bool ValidateLocalAuthCredentials(const Profile* profile,
                                   const std::string& password);
 
-bool LocalAuthCredentialsExist(size_t profile_info_index);
-
-bool LocalAuthCredentialsExist(const Profile* profile);
-
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SIGNIN_LOCAL_AUTH_H_