[Payments] Cache payment manifests.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 10af18245a31f20e8b2425cfd170a593d6844cce..efde13f221346b16fd214bc08d3e9060d0dda78a 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -3111,6 +3111,12 @@ split_static_library("browser") {
       "payments/android/chrome_payments_jni_registrar.h",
       "payments/android/journey_logger_android.cc",
       "payments/android/journey_logger_android.h",
+      "payments/android/payment_manifest_downloader_android.cc",
+      "payments/android/payment_manifest_downloader_android.h",
+      "payments/android/payment_manifest_parser_android.cc",
+      "payments/android/payment_manifest_parser_android.h",
+      "payments/android/payment_manifest_web_data_service_android.cc",
+      "payments/android/payment_manifest_web_data_service_android.h",
       "payments/android/ssl_validity_checker_android.cc",
       "payments/android/ssl_validity_checker_android.h",
       "permissions/grouped_permission_infobar_delegate_android.cc",
@@ -4181,6 +4187,9 @@ if (is_android) {
       "../android/java/src/org/chromium/chrome/browser/password_manager/AutoSigninFirstRunDialog.java",
       "../android/java/src/org/chromium/chrome/browser/password_manager/Credential.java",
       "../android/java/src/org/chromium/chrome/browser/payments/JourneyLogger.java",
+      "../android/java/src/org/chromium/chrome/browser/payments/PaymentManifestDownloader.java",
+      "../android/java/src/org/chromium/chrome/browser/payments/PaymentManifestParser.java",
+      "../android/java/src/org/chromium/chrome/browser/payments/PaymentManifestWebDataService.java",
       "../android/java/src/org/chromium/chrome/browser/payments/ServiceWorkerPaymentAppBridge.java",
       "../android/java/src/org/chromium/chrome/browser/payments/SslValidityChecker.java",
       "../android/java/src/org/chromium/chrome/browser/permissions/PermissionDialogController.java",