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

ios/chrome/browser/payments/payment_request_view_controller.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #include "ios/chrome/browser/payments/payment_request.h"
@@ skipping 31 matching lines @@
 - (void)paymentRequestViewControllerDidSelectPaymentMethodItem:
     (PaymentRequestViewController*)controller;
 
 @end
 
 // View controller responsible for presenting the details of a PaymentRequest to
 // the user and communicating their choices to the supplied delegate.
 @interface PaymentRequestViewController : CollectionViewController
 
 // The favicon of the page invoking the Payment Request API.
-@property(nonatomic, retain) UIImage* pageFavicon;
+@property(nonatomic, strong) UIImage* pageFavicon;
 
 // The title of the page invoking the Payment Request API.
 @property(nonatomic, copy) NSString* pageTitle;
 
 // The host of the page invoking the Payment Request API.
 @property(nonatomic, copy) NSString* pageHost;
 
 // The delegate to be notified when the user confirms or cancels the request.
 @property(nonatomic, weak) id<PaymentRequestViewControllerDelegate> delegate;
 
@@ skipping 18 matching lines @@
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)init NS_UNAVAILABLE;
 
 - (instancetype)initWithStyle:(CollectionViewControllerStyle)style
     NS_UNAVAILABLE;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_VIEW_CONTROLLER_H_