[Payments] Set cached manifest expiration date

components/payments/android/payment_method_manifest_table.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_METHOD_MANIFEST_TABLE_H_
 #define COMPONENTS_PAYMENTS_ANDROID_PAYMENT_METHOD_MANIFEST_TABLE_H_
 
 #include <string>
 #include <vector>
 
 #include "components/webdata/common/web_database.h"
 #include "components/webdata/common/web_database_table.h"
 
 namespace payments {
 
 // This class manages payment_method_manifest table in SQLite database. It
 // expects the following schema.
 //
 // payment_method_manifest The table stores WebAppManifestSection.id of the
 //                         supported web app in this payment method manifest.
 //                         Note that a payment method manifest might contain
 //                         multiple supported web apps ids.
+//
+//  expire_date            The expire date in seconds.

[please use gerrit instead, 2017/04/27 15:45:18]

Which epoch? Windows epoch starts in 1600. Unix epoch starts in 1971.

[gogerald1, 2017/04/27 18:08:39]

Done.

 //  method_name            The method name.
 //  web_app_id             The supported web app id.
 //                         (WebAppManifestSection.id).
 //
 class PaymentMethodManifestTable : public WebDatabaseTable {
  public:
   PaymentMethodManifestTable();
   ~PaymentMethodManifestTable() override;
 
   // Retrieves the PaymentMethodManifestTable* owned by |db|.
@@ skipping 14 matching lines @@
   // exists for this method.
   std::vector<std::string> GetManifest(const std::string& payment_method);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PaymentMethodManifestTable);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_ANDROID_PAYMENT_METHOD_MANIFEST_TABLE_H_