[Payment Request] Refactors edit view controller

ios/chrome/browser/ui/payments/address_edit_view_controller.mm

-// 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.
-
-#import "ios/chrome/browser/ui/payments/address_edit_view_controller.h"
-
-#include "components/strings/grit/components_strings.h"
-#import "ios/chrome/browser/ui/payments/payment_request_edit_view_controller+internal.h"
-#import "ios/chrome/browser/ui/payments/payment_request_editor_field.h"
-#include "ui/base/l10n/l10n_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-NSString* const kAddressEditCollectionViewAccessibilityID =
-    @"kAddressEditCollectionViewAccessibilityID";
-
-}  // namespace
-
-@interface AddressEditViewController ()
-
-// The list of field definitions for the editor.
-@property(nonatomic, weak) NSArray<EditorField*>* fields;
-
-@end
-
-@implementation AddressEditViewController
-
-@synthesize delegate = _delegate;
-@synthesize fields = _fields;
-
-#pragma mark - Setters
-
-- (void)setDelegate:(id<AddressEditViewControllerDelegate>)delegate {
-  [super setDelegate:delegate];
-  _delegate = delegate;
-}
-
-#pragma mark - CollectionViewController methods
-
-- (void)viewDidLoad {
-  [super viewDidLoad];
-
-  self.collectionView.accessibilityIdentifier =
-      kAddressEditCollectionViewAccessibilityID;
-}
-
-#pragma mark - PaymentRequestEditViewControllerActions methods
-
-- (void)onCancel {
-  [super onCancel];
-
-  [self.delegate addressEditViewControllerDidCancel:self];
-}
-
-- (void)onDone {
-  [super onDone];
-
-  if (![self validateForm])
-    return;
-
-  [self.delegate addressEditViewController:self
-                    didFinishEditingFields:self.fields];
-}
-
-@end