[ObjC ARC] Converts ios/chrome/browser/ui/settings:unit_tests to ARC.

ios/chrome/browser/payments/credit_card_edit_view_controller_unittest.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/credit_card_edit_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "components/autofill/core/browser/field_types.h"
 #include "components/autofill/core/browser/test_personal_data_manager.h"
@@ skipping 41 matching lines @@
                                           value:@"2090"
                                        required:YES],
   ];
 }
 
 @end
 
 class PaymentRequestCreditCardEditViewControllerTest
     : public CollectionViewControllerTest {
  protected:
-  CollectionViewController* NewController() override NS_RETURNS_RETAINED {
+  CollectionViewController* InstantiateController() override {
     payment_request_ = base::MakeUnique<PaymentRequest>(
         payment_request_test_util::CreateTestWebPaymentRequest(),
         &personal_data_manager_);
 
     CreditCardEditViewControllerMediator* mediator =
         [[CreditCardEditViewControllerMediator alloc]
             initWithPaymentRequest:payment_request_.get()
                         creditCard:nil];
 
     CreditCardEditViewController* viewController =
@@ skipping 73 matching lines @@
   ASSERT_EQ(7, NumberOfSections());
 
   // The switch section is the last section before the footer and has one item
   // of the type CollectionViewSwitchItem. The switch is on by defualt.
   ASSERT_EQ(1U, static_cast<unsigned int>(NumberOfItemsInSection(5)));
   id item = GetCollectionViewItem(5, 0);
   EXPECT_TRUE([item isMemberOfClass:[CollectionViewSwitchItem class]]);
   CollectionViewSwitchItem* switch_item = item;
   EXPECT_EQ(YES, [switch_item isOn]);
 }