Reland "Use upstream libaddressinput in Chrome."

third_party/libaddressinput/chromium/fallback_data_store.h

+// Copyright 2014 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 THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_FALLBACK_DATA_STORE_H_
+#define THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_FALLBACK_DATA_STORE_H_
+
+#include <string>
+
+namespace autofill {
+
+class FallbackDataStore {
+ public:
+  // Gets stale, but valid static data for |key|. Should only be used as a last
+  // resort after attempts to check the local cache or the webserver have
+  // failed.
+  static bool Get(const std::string& key, std::string* data);
+};
+
+}  // namespace autofill
+
+#endif  // THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_FALLBACK_DATA_STORE_H_