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

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

-// 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.
-
-#include "language.h"
-
-#include <algorithm>
-#include <cctype>
-#include <string>
-#include <vector>
-
-#include "rule.h"
-#include "util/string_util.h"
-
-namespace i18n {
-namespace addressinput {
-
-Language::Language(const std::string& language_tag) : tag(language_tag),
-                                                      base(),
-                                                      has_latin_script(false) {
-  // Character '-' is the separator for subtags in the BCP 47. However, some
-  // legacy code generates tags with '_' instead of '-'.
-  static const char kSubtagsSeparator = '-';
-  static const char kAlternativeSubtagsSeparator = '_';
-  std::replace(tag.begin(), tag.end(), kAlternativeSubtagsSeparator,
-               kSubtagsSeparator);
-
-  // OK to use 'tolower' because BCP 47 tags are always in ASCII.
-  std::string lowercase = tag;
-  std::transform(lowercase.begin(), lowercase.end(), lowercase.begin(),
-                 tolower);
-
-  base = lowercase.substr(0, lowercase.find(kSubtagsSeparator));
-
-  // The lowercase BCP 47 subtag for Latin script.
-  static const char kLowercaseLatinScript[] = "latn";
-  std::vector<std::string> subtags;
-  SplitString(lowercase, kSubtagsSeparator, &subtags);
-
-  // Support only the second and third position for the script.
-  has_latin_script =
-      (subtags.size() > 1 && subtags[1] == kLowercaseLatinScript) ||
-      (subtags.size() > 2 && subtags[2] == kLowercaseLatinScript);
-}
-
-Language::~Language() {}
-
-Language ChooseBestAddressLanguage(const Rule& address_region_rule,
-                                   const Language& ui_language) {
-  if (address_region_rule.GetLanguages().empty()) {
-    return ui_language;
-  }
-
-  std::vector<Language> available_languages;
-  for (std::vector<std::string>::const_iterator
-       language_tag_it = address_region_rule.GetLanguages().begin();
-       language_tag_it != address_region_rule.GetLanguages().end();
-       ++language_tag_it) {
-    available_languages.push_back(Language(*language_tag_it));
-  }
-
-  if (ui_language.tag.empty()) {
-    return available_languages.front();
-  }
-
-  bool has_latin_format = !address_region_rule.GetLatinFormat().empty();
-
-  // The conventionally formatted BCP 47 Latin script with a preceding subtag
-  // separator.
-  static const char kLatinScriptSuffix[] = "-Latn";
-  Language latin_script_language(
-      available_languages.front().base + kLatinScriptSuffix);
-  if (has_latin_format && ui_language.has_latin_script) {
-    return latin_script_language;
-  }
-
-  for (std::vector<Language>::const_iterator
-       available_lang_it = available_languages.begin();
-       available_lang_it != available_languages.end(); ++available_lang_it) {
-    // Base language comparison works because no region supports the same base
-    // language with different scripts, for now. For example, no region supports
-    // "zh-Hant" and "zh-Hans" at the same time.
-    if (ui_language.base == available_lang_it->base) {
-      return *available_lang_it;
-    }
-  }
-
-  return has_latin_format ? latin_script_language : available_languages.front();
-}
-
-}  // namespace addressinput
-}  // namespace i18n