[Payment Request] Refactors the remaining selector view controllers

ios/chrome/browser/payments/payment_method_selection_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_METHOD_SELECTION_VIEW_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_METHOD_SELECTION_VIEW_CONTROLLER_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
-
-class PaymentRequest;
-
-namespace autofill {
-class CreditCard;
-}  // namespace autofill
-
-@class PaymentMethodSelectionViewController;
-
-// Delegate protocol for PaymentMethodSelectionViewController.
-@protocol PaymentMethodSelectionViewControllerDelegate<NSObject>
-
-// Notifies the delegate that the user has selected a payment method.
-- (void)paymentMethodSelectionViewController:
-            (PaymentMethodSelectionViewController*)controller
-                      didSelectPaymentMethod:
-                          (autofill::CreditCard*)paymentMethod;
-
-// Notifies the delegate that the user has chosen to return to the previous
-// screen without making a selection.
-- (void)paymentMethodSelectionViewControllerDidReturn:
-    (PaymentMethodSelectionViewController*)controller;
-
-// Notifies the delegate that the user has chosen to add a new credit card.
-- (void)paymentMethodSelectionViewControllerDidSelectAddCard:
-    (PaymentMethodSelectionViewController*)controller;
-
-@end
-
-// View controller responsible for presenting the available payment methods for
-// selection by the user and communicating their choice to the supplied
-// delegate. Also offers a button to add a new payment method.
-@interface PaymentMethodSelectionViewController : CollectionViewController
-
-// The delegate to be notified when the user selects a payment method or chooses
-// to return without selecting one.
-@property(nonatomic, weak)
-    id<PaymentMethodSelectionViewControllerDelegate> delegate;
-
-// Initializes this object with an instance of PaymentRequest which has a copy
-// of web::PaymentRequest as provided by the page invoking the Payment Request
-// API. This object will not take ownership of |paymentRequest|.
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
-    NS_DESIGNATED_INITIALIZER;
-
-- (instancetype)init NS_UNAVAILABLE;
-
-- (instancetype)initWithStyle:(CollectionViewControllerStyle)style
-    NS_UNAVAILABLE;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_PAYMENTS_PAYMENT_METHOD_SELECTION_VIEW_CONTROLLER_H_