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

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
index c799a7814d292cdd7bc2d8c0ae2cbdbe67d61180..2130da2a4a2218903782ef8722024ff6b48e10c1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentInstrument.java
@@ -4,11 +4,11 @@
 
 package org.chromium.chrome.browser.payments;
 
+import org.json.JSONObject;
+
 import org.chromium.chrome.browser.payments.ui.PaymentOption;
 import org.chromium.payments.mojom.PaymentItem;
 
-import org.json.JSONObject;
-
 import java.util.List;
 
 /**
@@ -20,6 +20,12 @@ public abstract class PaymentInstrument extends PaymentOption {
      */
     public interface DetailsCallback {
         /**
+         * 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".