[Payment Request] Error message screen

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/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 12 matching lines @@
 #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"
 
 using payment_request_util::NameLabelFromAutofillProfile;
 using payment_request_util::AddressLabelFromAutofillProfile;
 using payment_request_util::PhoneNumberLabelFromAutofillProfile;
 
-NSString* const kShippingAddressSelectionCollectionViewId =
-    @"kShippingAddressSelectionCollectionViewId";
+NSString* const kShippingAddressSelectionCollectionViewID =
+    @"kShippingAddressSelectionCollectionViewID";
 
 namespace {
 
 const CGFloat kSeparatorEdgeInset = 14;
 
 typedef NS_ENUM(NSInteger, SectionIdentifier) {
   SectionIdentifierShippingAddress = kSectionIdentifierEnumZero,
 };
 
 typedef NS_ENUM(NSInteger, ItemType) {
@@ skipping 27 matching lines @@
 
 @synthesize isLoading = _isLoading;
 @synthesize errorMessage = _errorMessage;
 
 - (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest {
   DCHECK(paymentRequest);
   if ((self = [super initWithStyle:CollectionViewControllerStyleAppBar])) {
     self.title = l10n_util::GetNSString(
         IDS_IOS_PAYMENT_REQUEST_SHIPPING_ADDRESS_SELECTION_TITLE);
 
+    // Set up leading (return) button.
     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;
@@ skipping 64 matching lines @@
       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];
   self.collectionView.accessibilityIdentifier =
-      kShippingAddressSelectionCollectionViewId;
+      kShippingAddressSelectionCollectionViewID;
 
   // Customize collection view settings.
   self.styler.cellStyle = MDCCollectionViewCellStyleCard;
   self.styler.separatorInset =
       UIEdgeInsetsMake(0, kSeparatorEdgeInset, 0, kSeparatorEdgeInset);
 }
 
 #pragma mark UICollectionViewDataSource
 
 - (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView
@@ skipping 86 matching lines @@
     hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
   NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
   if (type == ItemTypeMessage) {
     return YES;
   } else {
     return NO;
   }
 }
 
 @end