Revert of PaymentRequest: Introduce PaymentDetailsInit and PaymentDetailsUpdate.

components/payments/content/payment_request.cc

 // 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.
 
 #include "components/payments/content/payment_request.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "components/payments/content/payment_details_validation.h"
@@ skipping 28 matching lines @@
     std::vector<payments::mojom::PaymentMethodDataPtr> method_data,
     payments::mojom::PaymentDetailsPtr details,
     payments::mojom::PaymentOptionsPtr options) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   std::string error;
   if (!payments::validatePaymentDetails(details, &error)) {
     LOG(ERROR) << error;
     OnConnectionTerminated();
     return;
   }
-  if (!details->total) {
-    LOG(ERROR) << "Missing total";
-    OnConnectionTerminated();
-    return;
-  }
   client_ = std::move(client);
   spec_ = base::MakeUnique<PaymentRequestSpec>(
       std::move(options), std::move(details), std::move(method_data), this,
       delegate_->GetApplicationLocale());
   state_ = base::MakeUnique<PaymentRequestState>(
       spec_.get(), this, delegate_->GetApplicationLocale(),
       delegate_->GetPersonalDataManager());
 }
 
 void PaymentRequest::Show() {
@@ skipping 67 matching lines @@
   binding_.Close();
   delegate_->CloseDialog();
   manager_->DestroyRequest(this);
 }
 
 void PaymentRequest::Pay() {
   state_->GeneratePaymentResponse();
 }
 
 }  // namespace payments