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

components/user_manager/known_user.cc

 // Copyright 2015 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.
 
 #include "components/user_manager/known_user.h"
 
+#include <stddef.h>
+
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/values.h"
 #include "chromeos/login/user_names.h"
 #include "components/user_manager/user_manager.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 namespace user_manager {
@@ skipping 308 matching lines @@
     }
   }
 }
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterListPref(kKnownUsers);
 }
 
 }  // namespace known_user
 }  // namespace user_manager