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

ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm

Index: ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm
diff --git a/ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm b/ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm
index 127361f5a12a27b6b58a6a01ac8f3858fd8b9efd..e719300f589e1598a85ce9e11e453a70ed1ffa35 100644
--- a/ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm
+++ b/ios/chrome/browser/payments/payment_items_display_coordinator_unittest.mm
@@ -18,6 +18,10 @@
 #include "third_party/ocmock/OCMock/OCMock.h"
 #include "third_party/ocmock/gtest_support.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 typedef PlatformTest PaymentItemsDisplayCoordinatorTest;
 
 // Tests that invoking start and stop on the coordinator presents and dismisses
@@ -26,15 +30,14 @@ TEST(PaymentItemsDisplayCoordinatorTest, StartAndStop) {
   std::unique_ptr<PaymentRequest> payment_request =
       payment_request_test_util::CreateTestPaymentRequest();
 
-  UIViewController* base_view_controller =
-      [[[UIViewController alloc] init] autorelease];
+  UIViewController* base_view_controller = [[UIViewController alloc] init];
   UINavigationController* navigation_controller =
-      [[[UINavigationController alloc]
-          initWithRootViewController:base_view_controller] autorelease];
+      [[UINavigationController alloc]
+          initWithRootViewController:base_view_controller];
 
   PaymentItemsDisplayCoordinator* coordinator =
-      [[[PaymentItemsDisplayCoordinator alloc]
-          initWithBaseViewController:base_view_controller] autorelease];
+      [[PaymentItemsDisplayCoordinator alloc]
+          initWithBaseViewController:base_view_controller];
   [coordinator setPaymentRequest:payment_request.get()];
 
   EXPECT_EQ(1u, navigation_controller.viewControllers.count);
@@ -57,15 +60,14 @@ TEST(PaymentItemsDisplayCoordinatorTest, DidConfirm) {
   std::unique_ptr<PaymentRequest> payment_request =
       payment_request_test_util::CreateTestPaymentRequest();
 
-  UIViewController* base_view_controller =
-      [[[UIViewController alloc] init] autorelease];
+  UIViewController* base_view_controller = [[UIViewController alloc] init];
   UINavigationController* navigation_controller =
-      [[[UINavigationController alloc]
-          initWithRootViewController:base_view_controller] autorelease];
+      [[UINavigationController alloc]
+          initWithRootViewController:base_view_controller];
 
   PaymentItemsDisplayCoordinator* coordinator =
-      [[[PaymentItemsDisplayCoordinator alloc]
-          initWithBaseViewController:base_view_controller] autorelease];
+      [[PaymentItemsDisplayCoordinator alloc]
+          initWithBaseViewController:base_view_controller];
   [coordinator setPaymentRequest:payment_request.get()];
 
   // Mock the coordinator delegate.
@@ -97,15 +99,14 @@ TEST(PaymentItemsDisplayCoordinatorTest, DidReturn) {
   std::unique_ptr<PaymentRequest> payment_request =
       payment_request_test_util::CreateTestPaymentRequest();
 
-  UIViewController* base_view_controller =
-      [[[UIViewController alloc] init] autorelease];
+  UIViewController* base_view_controller = [[UIViewController alloc] init];
   UINavigationController* navigation_controller =
-      [[[UINavigationController alloc]
-          initWithRootViewController:base_view_controller] autorelease];
+      [[UINavigationController alloc]
+          initWithRootViewController:base_view_controller];
 
   PaymentItemsDisplayCoordinator* coordinator =
-      [[[PaymentItemsDisplayCoordinator alloc]
-          initWithBaseViewController:base_view_controller] autorelease];
+      [[PaymentItemsDisplayCoordinator alloc]
+          initWithBaseViewController:base_view_controller];
   [coordinator setPaymentRequest:payment_request.get()];
 
   // Mock the coordinator delegate.