[Payment Request] Change the lifetime management of PaymentRequestImpl

components/payments/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/payment_request.h"
+
+#include "components/payments/payment_details_validation.h"
+#include "components/payments/payment_request_delegate.h"
+#include "components/payments/payment_request_web_contents_manager.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/web_contents.h"
+
+namespace payments {
+
+PaymentRequest::PaymentRequest(
+    content::WebContents* web_contents,
+    std::unique_ptr<PaymentRequestDelegate> delegate,
+    PaymentRequestWebContentsManager* manager,
+    mojo::InterfaceRequest<payments::mojom::PaymentRequest> request)
+    : web_contents_(web_contents),
+      delegate_(std::move(delegate)),
+      manager_(manager),
+      binding_(this, std::move(request)) {
+  binding_.set_connection_error_handler(
+      base::Bind(&PaymentRequest::OnError, base::Unretained(this)));
+}
+
+PaymentRequest::~PaymentRequest() {}
+
+void PaymentRequest::Init(
+    payments::mojom::PaymentRequestClientPtr client,
+    std::vector<payments::mojom::PaymentMethodDataPtr> methodData,
+    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;
+    OnError();
+    return;
+  }
+  client_ = std::move(client);
+  details_ = std::move(details);
+}
+
+void PaymentRequest::Show() {
+  delegate_->ShowPaymentRequestDialog(this);
+}
+
+void PaymentRequest::Cancel() {
+  client_->OnError(payments::mojom::PaymentErrorReason::USER_CANCEL);
+}
+
+void PaymentRequest::OnError() {
+  binding_.Close();
+  manager_->DestroyRequest(this);
+}
+
+}  // namespace payments