[Payments] Set cached manifest expiration date

components/payments/android/payment_manifest_web_data_service.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 COMPONENTS_PAYMENTS_ANDROID_PAYMENT_MANIFEST_WEB_DATA_SERVICE_H_
 #define COMPONENTS_PAYMENTS_ANDROID_PAYMENT_MANIFEST_WEB_DATA_SERVICE_H_
 
 #include "base/memory/ref_counted.h"
 #include "components/payments/android/payment_method_manifest_table.h"
 #include "components/payments/android/web_app_manifest_section_table.h"
@@ skipping 27 matching lines @@
       WebDataServiceConsumer* consumer);
 
   // Gets the |payment_method|'s manifest.
   WebDataServiceBase::Handle GetPaymentMethodManifest(
       const std::string& payment_method,
       WebDataServiceConsumer* consumer);
 
  private:
   ~PaymentManifestWebDataService() override;
 
+  void RemoveExpiredData(WebDatabase* db);
+
   WebDatabase::State AddPaymentWebAppManifestImpl(
       const std::vector<mojom::WebAppManifestSectionPtr>& manifest,
       WebDatabase* db);
   WebDatabase::State AddPaymentMethodManifestImpl(
       const std::string& payment_method,
       const std::vector<std::string>& app_package_names,
       WebDatabase* db);
 
   std::unique_ptr<WDTypedResult> GetPaymentWebAppManifestImpl(
       const std::string& web_app,
       WebDatabase* db);
   std::unique_ptr<WDTypedResult> GetPaymentMethodManifestImpl(
       const std::string& payment_method,
       WebDatabase* db);
 
   DISALLOW_COPY_AND_ASSIGN(PaymentManifestWebDataService);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_ANDROID_PAYMENT_MANIFEST_WEB_DATA_SERVICE_H_