[Payment Request] Adds address normalization on iOS.

ios/chrome/browser/autofill/validation_rules_storage_factory.cc

+// Copyright 2017 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 "ios/chrome/browser/autofill/validation_rules_storage_factory.h"
+
+#include "base/files/file_path.h"
+#include "base/path_service.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "components/prefs/json_pref_store.h"
+#include "components/prefs/pref_filter.h"
+#include "ios/chrome/browser/chrome_paths.h"
+#include "ios/web/public/web_thread.h"
+#include "third_party/libaddressinput/chromium/chrome_storage_impl.h"
+
+namespace autofill {
+
+using ::i18n::addressinput::Storage;
+
+// static
+std::unique_ptr<Storage> ValidationRulesStorageFactory::CreateStorage() {
+  static base::LazyInstance<ValidationRulesStorageFactory>::DestructorAtExit
+      instance = LAZY_INSTANCE_INITIALIZER;
+  return std::unique_ptr<Storage>(
+      new ChromeStorageImpl(instance.Get().json_pref_store_.get()));
+}
+
+ValidationRulesStorageFactory::ValidationRulesStorageFactory() {
+  base::FilePath user_data_dir;
+  bool success = PathService::Get(ios::DIR_USER_DATA, &user_data_dir);
+  DCHECK(success);
+
+  base::FilePath cache =
+      user_data_dir.Append(FILE_PATH_LITERAL("Address Validation Rules"));
+
+  scoped_refptr<base::SequencedTaskRunner> task_runner =
+      JsonPrefStore::GetTaskRunnerForFile(cache,
+                                          web::WebThread::GetBlockingPool());
+
+  json_pref_store_ = new JsonPrefStore(cache, task_runner.get(),
+                                       std::unique_ptr<PrefFilter>());
+  json_pref_store_->ReadPrefsAsync(NULL);
+}
+
+ValidationRulesStorageFactory::~ValidationRulesStorageFactory() {}
+
+}  // namespace autofill