[Payment Request] CanMakePayment

ios/chrome/browser/payments/ios_can_make_payment_query_factory.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_PAYMENTS_IOS_CAN_MAKE_PAYMENT_QUERY_FACTORY_H_
+#define IOS_CHROME_BROWSER_PAYMENTS_IOS_CAN_MAKE_PAYMENT_QUERY_FACTORY_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+namespace payments {
+class CanMakePaymentQuery;
+}  // namespace payments
+
+// Ensures that there's only one instance of CanMakePaymentQuery per browser
+// state.
+class IOSCanMakePaymentQueryFactory : public BrowserStateKeyedServiceFactory {
+ public:
+  static IOSCanMakePaymentQueryFactory* GetInstance();
+  payments::CanMakePaymentQuery* GetForBrowserState(
+      ios::ChromeBrowserState* browser_state);
+
+ private:
+  friend struct base::DefaultSingletonTraits<IOSCanMakePaymentQueryFactory>;
+
+  IOSCanMakePaymentQueryFactory();
+  ~IOSCanMakePaymentQueryFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  std::unique_ptr<KeyedService> BuildServiceInstanceFor(
+      web::BrowserState* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(IOSCanMakePaymentQueryFactory);
+};
+
+#endif  // IOS_CHROME_BROWSER_PAYMENTS_IOS_CAN_MAKE_PAYMENT_QUERY_FACTORY_H_