Switch to standard integer types in components/, part 3 of 4.

components/signin/core/account_id/account_id.h

 // 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.
 
 #ifndef COMPONENTS_SIGNIN_CORE_ACCOUNT_ID_ACCOUNT_ID_H_
 #define COMPONENTS_SIGNIN_CORE_ACCOUNT_ID_ACCOUNT_ID_H_
 
+#include <stddef.h>
+
 #include <string>
 #include "base/containers/hash_tables.h"
 
 // Type that contains enough information to identify user.
 //
 // TODO (alemate): we are in the process of moving away from std::string as a
 // type for storing user identifier to AccountId. At this time GaiaId is mostly
 // empty, so this type is used as a replacement for e-mail string.
 // But in near future AccountId will become full feature user identifier.
 class AccountId {
@@ skipping 50 matching lines @@
 
 // Implement hashing of AccountId, so it can be used as a key in STL containers.
 template <>
 struct hash<AccountId> {
   std::size_t operator()(const AccountId& user_id) const;
 };
 
 }  // namespace BASE_HASH_NAMESPACE
 
 #endif  // COMPONENTS_SIGNIN_CORE_ACCOUNT_ID_ACCOUNT_ID_H_