[Payment Request] Refactors the remaining selector view controllers

ios/chrome/browser/payments/shipping_address_selection_mediator.mm

 // 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.
 
 #include <vector>
 
 #import "ios/chrome/browser/payments/shipping_address_selection_mediator.h"
 
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/strings/grit/components_strings.h"
@@ skipping 22 matching lines @@
 // pointer and should outlive this class.
 @property(nonatomic, assign) PaymentRequest* paymentRequest;
 
 // The selectable items to display in the collection.
 @property(nonatomic, strong) NSArray<AutofillProfileItem*>* items;
 
 @end
 
 @implementation ShippingAddressSelectionMediator
 
+@synthesize headerText = _headerText;
 @synthesize state = _state;
 @synthesize selectedItemIndex = _selectedItemIndex;
 @synthesize paymentRequest = _paymentRequest;
 @synthesize items = _items;
-@synthesize headerText = _headerText;
 
 - (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest {
   self = [super init];
   if (self) {
     _paymentRequest = paymentRequest;
     _selectedItemIndex = NSUIntegerMax;
     _items = [self createItems];
   }
   return self;
 }
@@ skipping 43 matching lines @@
     item.phoneNumber = GetPhoneNumberLabelFromAutofillProfile(*shippingAddress);
     if (_paymentRequest->selected_shipping_profile() == shippingAddress)
       _selectedItemIndex = index;
 
     [items addObject:item];
   }
   return items;
 }
 
 @end