[Payment Request] Formats phone number and credit card number in editors.

components/payments/core/payment_request_data_util.h

 // 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.
 
 #ifndef COMPONENTS_PAYMENTS_CORE_PAYMENT_REQUEST_DATA_UTIL_H_
 #define COMPONENTS_PAYMENTS_CORE_PAYMENT_REQUEST_DATA_UTIL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 53 matching lines @@
                                   const std::string& country_code);
 
 // Formats the given number |phone_number| to
 // i18n::phonenumbers::PhoneNumberUtil::PhoneNumberFormat::E164 format by using
 // i18n::phonenumbers::PhoneNumberUtil::Format, as defined in the Payment
 // Request spec
 // (https://w3c.github.io/browser-payment-api/#paymentrequest-updated-algorithm)
 std::string FormatPhoneForResponse(const std::string& phone_number,
                                    const std::string& country_code);
 
+// Formats |card_number| for display. For example, "4111111111111111" is
+// formatted into "4111 1111 1111 1111". This method does not format masked card
+// numbers, which start with a letter.
+base::string16 FormatCardNumberForDisplay(const base::string16& card_number);
+
 // Returns a country code to be used when validating this profile. If the
 // profile has a valid country code set, it is returned. If not, a country code
 // associated with |app_locale| is used as a fallback.
 std::string GetCountryCodeWithFallback(const autofill::AutofillProfile* profile,
                                        const std::string& app_locale);
 
 }  // namespace data_util
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CORE_PAYMENT_REQUEST_DATA_UTIL_H_