Autofill DOMUI Prefs should work with i18n phone numbers

chrome/browser/autofill/phone_number_i18n.h

+// Copyright (c) 2011 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 CHROME_BROWSER_AUTOFILL_PHONE_NUMBER_I18N_H_
+#define CHROME_BROWSER_AUTOFILL_PHONE_NUMBER_I18N_H_
+#pragma once
+
+#include <string>
+
+#include "base/string16.h"
+
+namespace autofill_i18n {
+
+bool PhoneNumbersMatch(const string16& number_a,
+                       const string16& number_b,
+                       const std::string& country_code);
+
+}  // namespace autofill_i18n
+
+#endif  // CHROME_BROWSER_AUTOFILL_PHONE_NUMBER_I18N_H_