[Payment Request] Change the lifetime management of PaymentRequestImpl

components/payments/payment_request_web_contents_manager.cc

Index: components/payments/payment_request_web_contents_manager.cc
diff --git a/components/payments/payment_request_web_contents_manager.cc b/components/payments/payment_request_web_contents_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bb358f921345e494a0a520db3d5aa9619a545a45
--- /dev/null
+++ b/components/payments/payment_request_web_contents_manager.cc
@@ -0,0 +1,45 @@
+// 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.
+
+#include "components/payments/payment_request_web_contents_manager.h"
+
+#include <memory>
+#include <utility>
+
+#include "base/logging.h"
+#include "components/payments/payment_request_delegate.h"
+
+DEFINE_WEB_CONTENTS_USER_DATA_KEY(payments::PaymentRequestWebContentsManager);
+
+namespace payments {
+
+PaymentRequestWebContentsManager::~PaymentRequestWebContentsManager() {}
+
+PaymentRequestWebContentsManager*
+PaymentRequestWebContentsManager::GetOrCreateForWebContents(
+    content::WebContents* web_contents) {
+  DCHECK(web_contents);
+  // CreateForWebContents does nothing if the delegate instance already exists.
+  PaymentRequestWebContentsManager::CreateForWebContents(web_contents);
+  return PaymentRequestWebContentsManager::FromWebContents(web_contents);
+}
+
+void PaymentRequestWebContentsManager::CreatePaymentRequest(
+    content::WebContents* web_contents,
+    std::unique_ptr<PaymentRequestDelegate> delegate,
+    mojo::InterfaceRequest<payments::mojom::PaymentRequest> request) {
+  std::unique_ptr<PaymentRequest> new_request(new PaymentRequest(
+      web_contents, std::move(delegate), this, std::move(request)));
+  PaymentRequest* request_ptr = new_request.get();
+  payment_requests_.insert(std::make_pair(request_ptr, std::move(new_request)));
+}
+
+void PaymentRequestWebContentsManager::DestroyRequest(PaymentRequest* request) {
+  payment_requests_.erase(request);
+}
+
+PaymentRequestWebContentsManager::PaymentRequestWebContentsManager(
+    content::WebContents* web_contents) {}
+
+}  // namespace payments