Switch to standard integer types in chrome/browser/, part 4 of 4.

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_
 
+#include <stddef.h>
+
 #include <string>
 
 #include "base/gtest_prod_util.h"
 
 class LocalAuthTest;
 class Profile;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ skipping 25 matching lines @@
   // testing.
   static std::string TruncateStringByBits(const std::string& str,
                                           const size_t len_bits);
 
   static void SetLocalAuthCredentialsWithEncoding(size_t profile_info_index,
                                                   const std::string& password,
                                                   char encoding_version);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_LOCAL_AUTH_H_