Add billing address as a mandatory field of Payments credit cards.

components/payments/core/autofill_payment_instrument_unittest.cc

Index: components/payments/core/autofill_payment_instrument_unittest.cc
diff --git a/components/payments/core/autofill_payment_instrument_unittest.cc b/components/payments/core/autofill_payment_instrument_unittest.cc
index 0c17f1bc8a886e514d8f2bcd97922ddbae4033de..a10c1ecb5af527cc8f78f1f4f5f1eb85ce05f468 100644
--- a/components/payments/core/autofill_payment_instrument_unittest.cc
+++ b/components/payments/core/autofill_payment_instrument_unittest.cc
@@ -135,6 +135,8 @@ TEST_F(AutofillPaymentInstrumentTest,
 // A Masked (server) card is a valid instrument for payment.
 TEST_F(AutofillPaymentInstrumentTest, IsCompleteForPayment_MaskedCard) {
   autofill::CreditCard card = autofill::test::GetMaskedServerCard();
+  ASSERT_GT(billing_profiles().size(), 0UL);
+  card.set_billing_address_id(billing_profiles()[0]->guid());
   AutofillPaymentInstrument instrument("visa", card, billing_profiles(),
                                        "en-US", nullptr);
   EXPECT_TRUE(instrument.IsCompleteForPayment());
@@ -144,6 +146,8 @@ TEST_F(AutofillPaymentInstrumentTest, IsCompleteForPayment_MaskedCard) {
 // An expired masked (server) card is not a valid instrument for payment.
 TEST_F(AutofillPaymentInstrumentTest, IsCompleteForPayment_ExpiredMaskedCard) {
   autofill::CreditCard card = autofill::test::GetMaskedServerCard();
+  ASSERT_GT(billing_profiles().size(), 0UL);
+  card.set_billing_address_id(billing_profiles()[0]->guid());
   card.SetExpirationYear(2016);  // Expired.
   AutofillPaymentInstrument instrument("visa", card, billing_profiles(),
                                        "en-US", nullptr);