[Payment Request] Moves PaymentRequest into the payments namespace

ios/chrome/browser/ui/payments/payment_items_display_view_controller_unittest.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/ui/payments/payment_items_display_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/test/scoped_task_environment.h"
 #include "components/autofill/core/browser/test_personal_data_manager.h"
@@ skipping 28 matching lines @@
 - (NSArray<CollectionViewItem*>*)lineItems {
   return @[ [[PriceItem alloc] init] ];
 }
 
 @end
 
 class PaymentRequestPaymentItemsDisplayViewControllerTest
     : public CollectionViewControllerTest {
  protected:
   CollectionViewController* InstantiateController() override {
-    payment_request_ = base::MakeUnique<TestPaymentRequest>(
+    payment_request_ = base::MakeUnique<payments::TestPaymentRequest>(
         payment_request_test_util::CreateTestWebPaymentRequest(),
         &personal_data_manager_);
     mediator_ = [[TestPaymentItemsDisplayMediator alloc] init];
     PaymentItemsDisplayViewController* viewController = [
         [PaymentItemsDisplayViewController alloc] initWithPayButtonEnabled:YES];
     [viewController setDataSource:mediator_];
     return viewController;
   }
 
   PaymentItemsDisplayViewController* GetPaymentItemsViewController() {
     return base::mac::ObjCCastStrict<PaymentItemsDisplayViewController>(
         controller());
   }
 
   base::test::ScopedTaskEnvironment scoped_task_evironment_;
 
   autofill::TestPersonalDataManager personal_data_manager_;
-  std::unique_ptr<TestPaymentRequest> payment_request_;
+  std::unique_ptr<payments::TestPaymentRequest> payment_request_;
   TestPaymentItemsDisplayMediator* mediator_ = nil;
 };
 
 // Tests that the correct number of items are displayed after loading the model.
 TEST_F(PaymentRequestPaymentItemsDisplayViewControllerTest, TestModel) {
   CreateController();
   CheckController();
   CheckTitleWithId(IDS_PAYMENTS_ORDER_SUMMARY_LABEL);
 
   [GetPaymentItemsViewController() loadModel];
 
   ASSERT_EQ(1, NumberOfSections());
   // There should be one item for the total and another one for sub-total.
   ASSERT_EQ(2U, static_cast<unsigned int>(NumberOfItemsInSection(0)));
 
   // They both should be of type PriceItem.
   id item = GetCollectionViewItem(0, 0);
   EXPECT_TRUE([item isMemberOfClass:[PriceItem class]]);
   item = GetCollectionViewItem(0, 1);
   EXPECT_TRUE([item isMemberOfClass:[PriceItem class]]);
 }