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

ios/chrome/browser/payments/payment_request_coordinator.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_COORDINATOR_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_COORDINATOR_H_
 
 #import <UIKit/UIKit.h>
 
 #include "components/autofill/core/browser/autofill_manager.h"
@@ skipping 55 matching lines @@
 // An instance of autofill::AutofillManager used for credit card unmasking. This
 // reference is not owned by this class.
 @property(nonatomic, assign) autofill::AutofillManager* autofillManager;
 
 // An ios::ChromeBrowserState instance. This reference is not owned by this
 // class.
 @property(nonatomic, assign) ios::ChromeBrowserState* browserState;
 
 // The favicon of the page invoking the PaymentRequest API. Should be set before
 // calling |start|.
-@property(nonatomic, retain) UIImage* pageFavicon;
+@property(nonatomic, strong) UIImage* pageFavicon;
 
 // The title of the page invoking the Payment Request API. Should be set before
 // calling |start|.
 @property(nonatomic, copy) NSString* pageTitle;
 
 // The host of the page invoking the Payment Request API. Should be set before
 // calling |start|.
 @property(nonatomic, copy) NSString* pageHost;
 
 // The delegate to be notified when the user confirms or cancels the request.
 @property(nonatomic, weak) id<PaymentRequestCoordinatorDelegate> delegate;
 
 // Updates the payment details of the PaymentRequest and updates the UI.
 - (void)updatePaymentDetails:(web::PaymentDetails)paymentDetails;
 
 // Called when a credit card has been successfully unmasked.
 - (void)fullCardRequestDidSucceedWithCard:(const autofill::CreditCard&)card
                                       CVC:(const base::string16&)cvc;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_REQUEST_COORDINATOR_H_