[Payments] Normalize billing address before sending to the merchant.

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java

 // Copyright 2016 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.
 
 package org.chromium.chrome.browser.payments;
 
 import android.graphics.drawable.Drawable;
 
 import org.json.JSONObject;
 
 import org.chromium.chrome.browser.payments.ui.PaymentOption;
 import org.chromium.payments.mojom.PaymentItem;
 
 import java.util.List;
 
 /**
  * The base class for a single payment instrument, e.g., a credit card.
  */
 public abstract class PaymentInstrument extends PaymentOption {
     /**
      * The interface for the requester of instrument details.
      */
     public interface InstrumentDetailsCallback {
         /**
+         * Called by the credit card payment instrument when CVC has been unmasked, but billing
+         * address has not been normalized yet.
+         */
+        void loadingInstrumentDetails();
+
+        /**
          * Called after retrieving instrument details.
          *
          * @param methodName         Method name. For example, "visa".
          * @param stringifiedDetails JSON-serialized object. For example, {"card": "123"}.
          */
         void onInstrumentDetailsReady(String methodName, String stringifiedDetails);
 
         /**
          * Called if unable to retrieve instrument details.
          */
@@ skipping 25 matching lines @@
      */
     public abstract void getInstrumentDetails(String merchantName, String origin, PaymentItem total,
             List<PaymentItem> cart, JSONObject details, InstrumentDetailsCallback callback);
 
     /**
      * Cleans up any resources held by the payment instrument. For example, closes server
      * connections.
      */
     public abstract void dismissInstrument();
 }