[Payment Request] Change the lifetime management of PaymentRequestImpl

chrome/browser/payments/payment_request_impl.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 "chrome/browser/payments/payment_request_impl.h"
-
-#include <map>
-
-#include "base/lazy_instance.h"
-#include "chrome/browser/ui/browser_dialogs.h"
-#include "components/payments/payment_details_validation.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/web_contents.h"
-
-namespace {
-
-class PaymentRequestFactory {
- public:
-  bool AssignPaymentRequest(
-      content::WebContents* web_contents,
-      mojo::InterfaceRequest<payments::mojom::PaymentRequest> request) {
-    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-    if (map_.find(web_contents) == map_.end()) {
-      scoped_refptr<payments::PaymentRequestImpl> p(
-          new payments::PaymentRequestImpl(web_contents, std::move(request)));
-      map_[web_contents] = p;
-      return true;
-    }
-    return false;
-  }
-
-  void UnassignPaymentRequest(content::WebContents* web_contents) {
-    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-    map_.erase(web_contents);
-  }
-
- private:
-  std::map<content::WebContents*, scoped_refptr<payments::PaymentRequestImpl>>
-      map_;
-};
-
-base::LazyInstance<PaymentRequestFactory> payment_request_factory;
-
-}  // namespace
-
-namespace payments {
-
-PaymentRequestImpl::PaymentRequestImpl(
-    content::WebContents* web_contents,
-    mojo::InterfaceRequest<payments::mojom::PaymentRequest> request)
-    : web_contents_(web_contents),
-      binding_(this, std::move(request)) {
-  binding_.set_connection_error_handler(
-      base::Bind(&PaymentRequestImpl::OnError, this));
-}
-
-PaymentRequestImpl::~PaymentRequestImpl() {}
-
-void PaymentRequestImpl::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 PaymentRequestImpl::Show() {
-  chrome::ShowPaymentRequestDialog(this);
-}
-
-void PaymentRequestImpl::Cancel() {
-  client_->OnError(payments::mojom::PaymentErrorReason::USER_CANCEL);
-}
-
-void PaymentRequestImpl::OnError() {
-  binding_.Close();
-  // TODO(krb): Close the dialog here, but avoid double-free
-  payment_request_factory.Get().UnassignPaymentRequest(web_contents_);
-}
-
-}  // namespace payments
-
-void CreatePaymentRequestHandler(
-    content::WebContents* web_contents,
-    mojo::InterfaceRequest<payments::mojom::PaymentRequest> request) {
-  payment_request_factory.Get().AssignPaymentRequest(web_contents,
-                                                     std::move(request));
-}