[Payment Request] Moves PaymentRequest into the payments namespace

ios/chrome/browser/ui/payments/payment_request_manager.mm

 // 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.
 
 #import "ios/chrome/browser/ui/payments/payment_request_manager.h"
 
 #include <string>
 
 #include "base/ios/block_types.h"
 #include "base/ios/ios_util.h"
@@ skipping 81 matching lines @@
   // View controller used to present the PaymentRequest view controller.
   __weak UIViewController* _baseViewController;
 
   // PersonalDataManager used to manage user credit cards and addresses.
   autofill::PersonalDataManager* _personalDataManager;
 
   // Object that has a copy of web::PaymentRequest as provided by the page
   // invoking the PaymentRequest API. Also caches credit cards and addresses
   // provided by the _personalDataManager and manages selected ones for the
   // current PaymentRequest flow.
-  std::unique_ptr<PaymentRequest> _paymentRequest;
+  std::unique_ptr<payments::PaymentRequest> _paymentRequest;
 
   // WebState for the tab this object is attached to.
   web::WebState* _webState;
 
   // Observer for |_webState|.
   std::unique_ptr<web::WebStateObserverBridge> _webStateObserver;
 
   // Boolean to track if the current WebState is enabled (JS callback is set
   // up).
   BOOL _webStateEnabled;
@@ skipping 289 matching lines @@
     return NO;
   }
 
   // TODO(crbug.com/711419): make sure multiple PaymentRequests can be active
   // simultaneously.
   if (_paymentRequest &&
       (_paymentRequest->web_payment_request() == webPaymentRequest)) {
     return YES;
   }
 
-  _paymentRequest = base::MakeUnique<PaymentRequest>(
+  _paymentRequest = base::MakeUnique<payments::PaymentRequest>(
       webPaymentRequest, _browserState, _personalDataManager, self);
 
   return YES;
 }
 
 - (BOOL)handleRequestShow:(const base::DictionaryValue&)message {
   // TODO(crbug.com/602666): check that there's not already a pending request.
   // TODO(crbug.com/602666): compare our supported payment types (i.e. autofill
   //   credit card types) against the merchant supported types and return NO
   //   if the intersection is empty.
@@ skipping 373 matching lines @@
 #pragma mark - CRWWebStateObserver methods
 
 - (void)webState:(web::WebState*)webState
     didCommitNavigationWithDetails:
         (const web::LoadCommittedDetails&)load_details {
   [self dismissUI];
   [self enableCurrentWebState];
 }
 
 @end