Remove Chrome's own version of libaddressinput in favor of the upstream.

third_party/libaddressinput/chromium/cpp/src/language.h

-// Copyright (C) 2014 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef I18N_ADDRESSINPUT_LANGUAGE_H_
-#define I18N_ADDRESSINPUT_LANGUAGE_H_
-
-#include <string>
-
-namespace i18n {
-namespace addressinput {
-
-class Rule;
-
-// Helper for working with a BCP 47 language tag.
-// http://tools.ietf.org/html/bcp47
-struct Language {
-  explicit Language(const std::string& language_tag);
-  ~Language();
-
-  // The language tag (with '_' replaced with '-'), for example "zh-Latn-CN".
-  std::string tag;
-
-  // The base language, for example "zh". Always lowercase.
-  std::string base;
-
-  // True if the language tag explicitly has a Latin script. For example, this
-  // is true for "zh-Latn", but false for "zh". Only the second and third subtag
-  // positions are supported for script.
-  bool has_latin_script;
-};
-
-Language ChooseBestAddressLanguage(const Rule& address_region_rule,
-                                   const Language& ui_language);
-
-}  // namespace addressinput
-}  // namespace i18n
-
-#endif  // I18N_ADDRESSINPUT_LANGUAGE_H_