[Payment Request] Refactors the remaining selector view controllers

ios/chrome/browser/payments/shipping_option_selection_view_controller.h

-// Copyright 2017 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_SHIPPING_OPTION_SELECTION_VIEW_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_PAYMENTS_SHIPPING_OPTION_SELECTION_VIEW_CONTROLLER_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
-
-class PaymentRequest;
-
-namespace web {
-class PaymentShippingOption;
-}  // namespace web
-
-@class ShippingOptionSelectionViewController;
-
-// Delegate protocol for ShippingOptionSelectionViewController.
-@protocol ShippingOptionSelectionViewControllerDelegate<NSObject>
-
-// Notifies the delegate that the user has selected a shipping option.
-- (void)shippingOptionSelectionViewController:
-            (ShippingOptionSelectionViewController*)controller
-                      didSelectShippingOption:
-                          (web::PaymentShippingOption*)shippingOption;
-
-// Notifies the delegate that the user has chosen to return to the previous
-// screen without making a selection.
-- (void)shippingOptionSelectionViewControllerDidReturn:
-    (ShippingOptionSelectionViewController*)controller;
-
-@end
-
-// View controller responsible for presenting the available shipping options
-// for selection by the user and communicating their choice to the supplied
-// delegate.
-@interface ShippingOptionSelectionViewController : CollectionViewController
-
-// Whether or not the view is in a pending state.
-@property(nonatomic, assign, getter=isPending) BOOL pending;
-
-// The error message to display, if any.
-@property(nonatomic, copy) NSString* errorMessage;
-
-// The delegate to be notified when the user selects a shipping option or
-// returns without selecting one.
-@property(nonatomic, weak)
-    id<ShippingOptionSelectionViewControllerDelegate> 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_SHIPPING_OPTION_SELECTION_VIEW_CONTROLLER_H_