[Payment Request] Records the use of data models used in Payment Request.

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 758 matching lines @@
         _pendingPaymentResponse.contactAddress.GetRawInfo(
             autofill::EMAIL_ADDRESS);
   }
 
   if (_paymentRequest->request_payer_phone()) {
     paymentResponse.payer_phone =
         _pendingPaymentResponse.contactAddress.GetRawInfo(
             autofill::PHONE_HOME_WHOLE_NUMBER);
   }
 
+  _paymentRequest->RecordUseStats();
+
   [_paymentRequestJsManager
       resolveRequestPromiseWithPaymentResponse:paymentResponse
                              completionHandler:nil];
   [self setUnblockEventQueueTimer];
   [self setPaymentResponseTimeoutTimer];
 }
 
 - (void)paymentRequestCoordinator:(PaymentRequestCoordinator*)coordinator
          didSelectShippingAddress:
              (const autofill::AutofillProfile&)shippingAddress {
@@ skipping 18 matching lines @@
 #pragma mark - CRWWebStateObserver methods
 
 - (void)webState:(web::WebState*)webState
     didCommitNavigationWithDetails:
         (const web::LoadCommittedDetails&)load_details {
   [self dismissUI];
   [self enableCurrentWebState];
 }
 
 @end