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

ios/chrome/browser/payments/payment_request_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/payment_request_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/autofill_test_utils.h"
@@ skipping 21 matching lines @@
 class PaymentRequestViewControllerTest : public CollectionViewControllerTest {
  protected:
   PaymentRequestViewControllerTest()
       : autofill_profile_(autofill::test::GetFullProfile()),
         credit_card_(autofill::test::GetCreditCard()) {
     // Add testing profile and credit card to autofill::TestPersonalDataManager.
     personal_data_manager_.AddTestingProfile(&autofill_profile_);
     personal_data_manager_.AddTestingCreditCard(&credit_card_);
   }
 
-  CollectionViewController* NewController() override NS_RETURNS_RETAINED {
+  CollectionViewController* InstantiateController() override {
     payment_request_ = base::MakeUnique<PaymentRequest>(
         payment_request_test_util::CreateTestWebPaymentRequest(),
         &personal_data_manager_);
 
     return [[PaymentRequestViewController alloc]
         initWithPaymentRequest:payment_request_.get()];
   }
 
   PaymentRequestViewController* GetPaymentRequestViewController() {
     return base::mac::ObjCCastStrict<PaymentRequestViewController>(
@@ skipping 141 matching lines @@
   [GetPaymentRequestViewController() loadModel];
 
   ASSERT_EQ(1, NumberOfSections());
   // There should be only one item.
   ASSERT_EQ(1U, static_cast<unsigned int>(NumberOfItemsInSection(0)));
 
   // The item should be of type StatusItem.
   id item = GetCollectionViewItem(0, 0);
   EXPECT_TRUE([item isMemberOfClass:[StatusItem class]]);
 }