[Payment Request] Moves PaymentRequest into the payments namespace

ios/chrome/browser/ui/payments/payment_request_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 <Foundation/Foundation.h>
 
 #include "ios/chrome/browser/ui/payments/payment_request_mediator.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 36 matching lines @@
 using ::payment_request_util::GetPhoneNumberLabelFromAutofillProfile;
 using ::payment_request_util::GetShippingAddressLabelFromAutofillProfile;
 using ::payment_request_util::GetShippingSectionTitle;
 }  // namespace
 
 @interface PaymentRequestMediator ()
 
 // 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;
 
 @end
 
 @implementation PaymentRequestMediator
 
 @synthesize totalValueChanged = _totalValueChanged;
 @synthesize paymentRequest = _paymentRequest;
 
-- (instancetype)initWithPaymentRequest:(PaymentRequest*)paymentRequest {
+- (instancetype)initWithPaymentRequest:
+    (payments::PaymentRequest*)paymentRequest {
   self = [super init];
   if (self) {
     _paymentRequest = paymentRequest;
   }
   return self;
 }
 
 #pragma mark - PaymentRequestViewControllerDataSource
 
 - (BOOL)canPay {
@@ skipping 189 matching lines @@
     } else {
       item.text = l10n_util::GetNSString(
           IDS_PAYMENTS_CARD_AND_ADDRESS_SETTINGS_SIGNED_OUT);
     }
   }
   item.linkURL = GURL(kSettingsURL);
   return item;
 }
 
 @end