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diff --git a/chromium/third_party/libaddressinput/src/cpp/src/validating_util.h b/chromium/third_party/libaddressinput/src/cpp/src/validating_util.h
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+// 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.
+//
+// An object to wrap data with a checksum and a timestamp. These fields are used
+// to verify that the data is not stale or corrupted. Staleness threshold is 1
+// month.
+
+#ifndef I18N_ADDRESSINPUT_VALIDATING_UTIL_H_
+#define I18N_ADDRESSINPUT_VALIDATING_UTIL_H_
+
+#include <libaddressinput/util/basictypes.h>
+
+#include <ctime>
+#include <string>
+
+namespace i18n {
+namespace addressinput {
+
+// Wraps data with a checksum and a timestamp. Sample usage:
+//    std::string data = ...
+//    ValidatingUtil::Wrap(time(NULL), &data);
+//    Process(data);
+//
+//    std::string unwrapped = wrapped;
+//    if (ValidatingUtil::UnwrapTimestamp(&unwrapped, time(NULL)) &&
+//        ValidatingUtil::UnwrapChecksum(&unwrapped)) {
+//      Process(unwrapped);
+//    }
+class ValidatingUtil {
+ public:
+  // Adds checksum and given |timestamp| to |data|.
+  static void Wrap(time_t timestamp, std::string* data);
+
+  // Strips out the timestamp from |data|. Returns |true| if the timestamp is
+  // present, formatted correctly, valid, and recent with respect to |now|.
+  static bool UnwrapTimestamp(std::string* data, time_t now);
+
+  // Strips out the checksum from |data|. Returns |true| if the checksum is
+  // present, formatted correctly, and valid for this data.
+  static bool UnwrapChecksum(std::string* data);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ValidatingUtil);
+};
+
+}  // namespace addressinput
+}  // namespace i18n
+
+#endif  // I18N_ADDRESSINPUT_VALIDATING_UTIL_H_