[Payment Request] Moves PaymentRequest into the payments namespace

ios/chrome/browser/ui/payments/address_edit_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.
 
 #import "ios/chrome/browser/ui/payments/address_edit_mediator.h"
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 26 matching lines @@
 #error "This file requires ARC support."
 #endif
 
 @interface AddressEditMediator () {
   std::unique_ptr<RegionDataLoader> _regionDataLoader;
 }
 
 // The PaymentRequest object owning an instance of web::PaymentRequest as
 // provided by the page invoking the Payment Request API. This is a weak
 // pointer and should outlive this class.
-@property(nonatomic, assign) PaymentRequest* paymentRequest;
+@property(nonatomic, assign) payments::PaymentRequest* paymentRequest;
 
 // The address to be edited, if any. This pointer is not owned by this class and
 // should outlive it.
 @property(nonatomic, assign) autofill::AutofillProfile* address;
 
 // The map of autofill types to the cached editor fields. Helps reuse the editor
 // fields and therefore maintain their existing values when the selected country
 // changes and the editor fields get updated.
 @property(nonatomic, strong)
     NSMutableDictionary<NSNumber*, EditorField*>* fieldsMap;
@@ skipping 11 matching lines @@
 @synthesize state = _state;
 @synthesize consumer = _consumer;
 @synthesize countries = _countries;
 @synthesize selectedCountryCode = _selectedCountryCode;
 @synthesize paymentRequest = _paymentRequest;
 @synthesize address = _address;
 @synthesize fieldsMap = _fieldsMap;
 @synthesize fields = _fields;
 @synthesize regionField = _regionField;
 
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest
+- (instancetype)initWithPaymentRequest:(payments::PaymentRequest*)paymentRequest
                                address:(autofill::AutofillProfile*)address {
   self = [super init];
   if (self) {
     _paymentRequest = paymentRequest;
     _address = address;
     _state =
         _address ? EditViewControllerStateEdit : EditViewControllerStateCreate;
     _fieldsMap = [[NSMutableDictionary alloc] init];
     [self loadCountries];
   }
@@ skipping 260 matching lines @@
 // corresponding field value. Returns nil if |profile| is nullptr.
 - (NSString*)fieldValueFromProfile:(autofill::AutofillProfile*)profile
                          fieldType:(autofill::ServerFieldType)fieldType {
   return profile ? base::SysUTF16ToNSString(profile->GetInfo(
                        autofill::AutofillType(fieldType),
                        GetApplicationContext()->GetApplicationLocale()))
                  : nil;
 }
 
 @end