Restore Payments shipping address info when changing country

chrome/browser/ui/views/payments/shipping_address_editor_view_controller.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 CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 60 matching lines @@
     ShippingAddressEditorViewController* controller_;
 
     DISALLOW_COPY_AND_ASSIGN(ShippingAddressValidationDelegate);
   };
   friend class ShippingAddressValidationDelegate;
 
   // If non-nullptr, a point to an object to be edited, which should outlive
   // this controller.
   autofill::AutofillProfile* profile_to_edit_;
 
+  // A temporary profile to keep unsaved data in between relayout (e.g., when
+  // the country is changed and fields set may be different).
+  std::unique_ptr<autofill::AutofillProfile> temporary_profile_;
+
   // List of fields, reset everytime the current country changes.
   std::vector<EditorField> editor_fields_;
 
   // The currently chosen country. Defaults to 0 as the first entry in the
   // combobox, which is the generated default value received from
   // autofill::CountryComboboxModel::countries() which is documented to always
   // have the default country at the top as well as within the sorted list.
   size_t chosen_country_index_;
 
   // The list of country codes as ordered in the country combobox model.
   std::vector<std::string> country_codes_;
 
   // Identifies whether we tried and failed to load region data.
   bool failed_to_load_region_data_;
 
   // Updates |editor_fields_| based on the current country.
   void UpdateEditorFields();
 
   // Called when data changes need to force a view update.
   void OnDataChanged();
 
+  // Saves the current state of the |editor_fields_| in |profile| and ignore
+  // errors if |ignore_errors| is true. Return false on errors, ignored or not.
+  bool SaveFieldsToProfile(autofill::AutofillProfile* profile,
+                           bool ignore_errors);
+
   // When a combobox model has changed, a view update might be needed, e.g., if
   // there is no data in the combobox and it must be converted to a text field.
   void OnComboboxModelChanged(views::Combobox* combobox);
 
   DISALLOW_COPY_AND_ASSIGN(ShippingAddressEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_