[ObjC ARC] Converts ios/chrome/browser/payments:payments to ARC.

ios/chrome/browser/payments/shipping_address_selection_view_controller.mm

 // 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.
 
 #import "ios/chrome/browser/payments/shipping_address_selection_view_controller.h"
 
-#import "base/ios/weak_nsobject.h"
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/application_context.h"
 #import "ios/chrome/browser/payments/cells/payments_text_item.h"
 #import "ios/chrome/browser/payments/cells/shipping_address_item.h"
 #import "ios/chrome/browser/payments/payment_request_util.h"
 #import "ios/chrome/browser/ui/autofill/cells/status_item.h"
 #import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_text_item.h"
 #import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
 #import "ios/chrome/browser/ui/icons/chrome_icon.h"
 #include "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "ios/chrome/grit/ios_theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using payment_request_util::NameLabelFromAutofillProfile;
 using payment_request_util::AddressLabelFromAutofillProfile;
 using payment_request_util::PhoneNumberLabelFromAutofillProfile;
 
 NSString* const kShippingAddressSelectionCollectionViewId =
     @"kShippingAddressSelectionCollectionViewId";
 
 namespace {
 
 const CGFloat kSeparatorEdgeInset = 14;
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierShippingAddress = kSectionIdentifierEnumZero,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeSpinner = kItemTypeEnumZero,
   ItemTypeMessage,
   ItemTypeShippingAddress,  // This is a repeated item type.
   ItemTypeAddShippingAddress,
 };
 
 }  // namespace
 
 @interface ShippingAddressSelectionViewController () {
-  base::WeakNSProtocol<id<ShippingAddressSelectionViewControllerDelegate>>
-      _delegate;
-
   // The PaymentRequest object owning an instance of web::PaymentRequest as
   // provided by the page invoking the Payment Request API. This is a weak
   // pointer and should outlive this class.
   PaymentRequest* _paymentRequest;
 
   // The currently selected item. May be nil.
-  ShippingAddressItem* _selectedItem;
+  __weak ShippingAddressItem* _selectedItem;
 }
 
 // Called when the user presses the return button.
 - (void)onReturn;
 
 @end
 
 @implementation ShippingAddressSelectionViewController
 
 @synthesize isLoading = _isLoading;
 @synthesize errorMessage = _errorMessage;
+@synthesize delegate = _delegate;
 
 - (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest {
   DCHECK(paymentRequest);
   if ((self = [super initWithStyle:CollectionViewControllerStyleAppBar])) {
     self.title =
         payment_request_util::GetShippingAddressSelectorTitle(paymentRequest);
 
     UIBarButtonItem* returnButton =
         [ChromeIcon templateBarButtonItemWithImage:[ChromeIcon backIcon]
                                             target:nil
                                             action:@selector(onReturn)];
     returnButton.accessibilityLabel = l10n_util::GetNSString(IDS_ACCNAME_BACK);
     self.navigationItem.leftBarButtonItem = returnButton;
 
     _paymentRequest = paymentRequest;
   }
   return self;
 }
 
-- (id<ShippingAddressSelectionViewControllerDelegate>)delegate {
-  return _delegate.get();
-}
-
-- (void)setDelegate:
-    (id<ShippingAddressSelectionViewControllerDelegate>)delegate {
-  _delegate.reset(delegate);
-}
-
 - (void)onReturn {
   [_delegate shippingAddressSelectionViewControllerDidReturn:self];
 }
 
 #pragma mark - CollectionViewController methods
 
 - (void)loadModel {
   [super loadModel];
   CollectionViewModel* model = self.collectionViewModel;
   _selectedItem = nil;
 
   [model addSectionWithIdentifier:SectionIdentifierShippingAddress];
 
   if (_isLoading) {
-    StatusItem* statusItem =
-        [[[StatusItem alloc] initWithType:ItemTypeSpinner] autorelease];
+    StatusItem* statusItem = [[StatusItem alloc] initWithType:ItemTypeSpinner];
     statusItem.text =
         l10n_util::GetNSString(IDS_IOS_PAYMENT_REQUEST_CHECKING_LABEL);
     [model addItem:statusItem
         toSectionWithIdentifier:SectionIdentifierShippingAddress];
     return;
   }
 
   PaymentsTextItem* messageItem =
-      [[[PaymentsTextItem alloc] initWithType:ItemTypeMessage] autorelease];
+      [[PaymentsTextItem alloc] initWithType:ItemTypeMessage];
   if (_errorMessage) {
     messageItem.text = _errorMessage;
     messageItem.image = NativeImage(IDR_IOS_PAYMENTS_WARNING);
   } else {
     messageItem.text =
         payment_request_util::GetShippingAddressSelectorInfoMessage(
             _paymentRequest);
   }
   [model addItem:messageItem
       toSectionWithIdentifier:SectionIdentifierShippingAddress];
 
   for (const auto& shippingAddress : _paymentRequest->shipping_profiles()) {
-    ShippingAddressItem* item = [[[ShippingAddressItem alloc]
-        initWithType:ItemTypeShippingAddress] autorelease];
+    ShippingAddressItem* item =
+        [[ShippingAddressItem alloc] initWithType:ItemTypeShippingAddress];
     item.accessibilityTraits |= UIAccessibilityTraitButton;
     item.name = NameLabelFromAutofillProfile(shippingAddress);
     item.address = AddressLabelFromAutofillProfile(shippingAddress);
     item.phoneNumber = PhoneNumberLabelFromAutofillProfile(shippingAddress);
     if (_paymentRequest->selected_shipping_profile() == shippingAddress) {
       item.accessoryType = MDCCollectionViewCellAccessoryCheckmark;
       _selectedItem = item;
     }
     [model addItem:item
         toSectionWithIdentifier:SectionIdentifierShippingAddress];
   }
 
-  PaymentsTextItem* addShippingAddress = [[[PaymentsTextItem alloc]
-      initWithType:ItemTypeAddShippingAddress] autorelease];
+  PaymentsTextItem* addShippingAddress =
+      [[PaymentsTextItem alloc] initWithType:ItemTypeAddShippingAddress];
   addShippingAddress.text = l10n_util::GetNSString(
       IDS_IOS_PAYMENT_REQUEST_SHIPPING_ADDRESS_SELECTION_ADD_BUTTON);
   addShippingAddress.image = NativeImage(IDR_IOS_PAYMENTS_ADD);
   addShippingAddress.accessibilityTraits |= UIAccessibilityTraitButton;
   [model addItem:addShippingAddress
       toSectionWithIdentifier:SectionIdentifierShippingAddress];
 }
 
 - (void)viewDidLoad {
   [super viewDidLoad];
@@ skipping 98 matching lines @@
     hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
   NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
   if (type == ItemTypeMessage) {
     return YES;
   } else {
     return NO;
   }
 }
 
 @end