MAGETWO-44982: New shipping address for Customer is not saved in address book after checkout

Author: Stanislav Idolov

app/code/Magento/Checkout/view/frontend/web/js/action/select-billing-address.js

@@ -8,17 +8,15 @@ define(
         'jquery',
         '../model/quote'
     ],
-    function($, quote) {
-        "use strict";
-        return function(billingAddress) {
+    function ($, quote) {
+        'use strict';
+
+        return function (billingAddress) {
             var address = null;
+
             if (quote.shippingAddress() && billingAddress.getCacheKey() == quote.shippingAddress().getCacheKey()) {
                 address = $.extend({}, billingAddress);
                 address.saveInAddressBook = false;
-                if (quote.shippingAddress().saveInAddressBook || quote.shippingAddress().save_in_address_book) {
-                    address.saveInAddressBook = true;
-                    quote.shippingAddress().saveInAddressBook = false;
-                }
             } else {
                 address = billingAddress;
             }

app/code/Magento/Checkout/view/frontend/web/js/model/shipping-save-processor/default.js

@@ -6,45 +6,47 @@
 define(
     [
         'ko',
-        'jquery',
         'Magento_Checkout/js/model/quote',
         'Magento_Checkout/js/model/resource-url-manager',
         'mage/storage',
         'Magento_Checkout/js/model/payment-service',
         'Magento_Checkout/js/model/payment/method-converter',
         'Magento_Checkout/js/model/error-processor',
-        'Magento_Checkout/js/model/full-screen-loader'
+        'Magento_Checkout/js/model/full-screen-loader',
+        'Magento_Checkout/js/action/select-billing-address'
     ],
     function (
         ko,
-        $,
         quote,
         resourceUrlManager,
         storage,
         paymentService,
         methodConverter,
         errorProcessor,
-        fullScreenLoader
+        fullScreenLoader,
+        selectBillingAddressAction
     ) {
         'use strict';
+
         return {
-            saveShippingInformation: function() {
-                var billingAddress = quote.billingAddress();
-                if (!billingAddress) {
-                    billingAddress = $.extend({}, quote.shippingAddress());
-                    quote.billingAddress(billingAddress);
-                    quote.shippingAddress().sameAsBilling = 1;
+            saveShippingInformation: function () {
+                var payload;
+
+                if (!quote.billingAddress()) {
+                    selectBillingAddressAction(quote.shippingAddress());
                 }
-                var payload = {
+
+                payload = {
                     addressInformation: {
                         shipping_address: quote.shippingAddress(),
-                        billing_address: billingAddress,
+                        billing_address: quote.billingAddress(),
                         shipping_method_code: quote.shippingMethod().method_code,
                         shipping_carrier_code: quote.shippingMethod().carrier_code
                     }
                 };
 
                 fullScreenLoader.startLoader();
+
                 return storage.post(
                     resourceUrlManager.getUrlForSetShippingInformation(quote),
                     JSON.stringify(payload)