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

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

-// Copyright (C) 2013 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_REGION_DATA_CONSTANTS_H_
-#define I18N_ADDRESSINPUT_REGION_DATA_CONSTANTS_H_
-
-#include <string>
-#include <vector>
-
-namespace i18n {
-namespace addressinput {
-
-class RegionDataConstants {
- public:
-  static const std::vector<std::string>& GetRegionCodes();
-  static const std::string& GetRegionData(const std::string& region_code);
-  static const std::string& GetDefaultRegionData();
-
-  static const std::string& GetLanguageCompactLineSeparator(
-      const std::string& language_code);
-};
-
-}  // namespace addressinput
-}  // namespace i18n
-
-#endif  // I18N_ADDRESSINPUT_REGION_DATA_CONSTANTS_H_