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

ios/chrome/browser/payments/shipping_option_selection_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/payments/shipping_option_selection_view_controller.h"
 
-#import "base/ios/weak_nsobject.h"
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/payments/currency_formatter.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/payments/cells/payments_text_item.h"
 #include "ios/chrome/browser/payments/payment_request.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"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 NSString* const kShippingOptionSelectionCollectionViewId =
     @"kShippingOptionSelectionCollectionViewId";
 
 namespace {
 
 const CGFloat kSeparatorEdgeInset = 14;
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierShippingOption = kSectionIdentifierEnumZero,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeSpinner = kItemTypeEnumZero,
   ItemTypeMessage,
   ItemTypeShippingOption,  // This is a repeated item type.
 };
 
 }  // namespace
 
 @interface ShippingOptionSelectionViewController () {
-  base::WeakNSProtocol<id<ShippingOptionSelectionViewControllerDelegate>>
-      _delegate;
+  __weak id<ShippingOptionSelectionViewControllerDelegate> _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.
   CollectionViewTextItem* _selectedItem;
 }
 
@@ skipping 19 matching lines @@
                                             action:@selector(onReturn)];
     returnButton.accessibilityLabel = l10n_util::GetNSString(IDS_ACCNAME_BACK);
     self.navigationItem.leftBarButtonItem = returnButton;
 
     _paymentRequest = paymentRequest;
   }
   return self;
 }
 
 - (id<ShippingOptionSelectionViewControllerDelegate>)delegate {
-  return _delegate.get();
+  return _delegate;
 }
 
 - (void)setDelegate:
     (id<ShippingOptionSelectionViewControllerDelegate>)delegate {
-  _delegate.reset(delegate);
+  _delegate = delegate;
 }
 
 - (void)onReturn {
   [_delegate shippingOptionSelectionViewControllerDidReturn:self];
 }
 
 #pragma mark - CollectionViewController methods
 
 - (void)loadModel {
   [super loadModel];
   CollectionViewModel* model = self.collectionViewModel;
   _selectedItem = nil;
 
   [model addSectionWithIdentifier:SectionIdentifierShippingOption];
 
   if (self.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:SectionIdentifierShippingOption];
     return;
   }
 
   if (_errorMessage) {
     PaymentsTextItem* messageItem =
-        [[[PaymentsTextItem alloc] initWithType:ItemTypeMessage] autorelease];
+        [[PaymentsTextItem alloc] initWithType:ItemTypeMessage];
     messageItem.text = _errorMessage;
     messageItem.image = NativeImage(IDR_IOS_PAYMENTS_WARNING);
     [model addItem:messageItem
         toSectionWithIdentifier:SectionIdentifierShippingOption];
   }
 
   for (const auto& shippingOption : _paymentRequest->shipping_options()) {
-    CollectionViewTextItem* item = [[[CollectionViewTextItem alloc]
-        initWithType:ItemTypeShippingOption] autorelease];
+    CollectionViewTextItem* item =
+        [[CollectionViewTextItem alloc] initWithType:ItemTypeShippingOption];
     item.text = base::SysUTF16ToNSString(shippingOption->label);
     payments::CurrencyFormatter* currencyFormatter =
         _paymentRequest->GetOrCreateCurrencyFormatter();
     item.detailText = SysUTF16ToNSString(currencyFormatter->Format(
         base::UTF16ToASCII(shippingOption->amount.value)));
 
     // Styling.
     item.textFont = [MDCTypography body2Font];
     item.textColor = [[MDCPalette greyPalette] tint900];
     item.detailTextFont = [MDCTypography body1Font];
@@ skipping 103 matching lines @@
     hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
   NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
   if (type == ItemTypeMessage) {
     return YES;
   } else {
     return NO;
   }
 }
 
 @end