[Payments] Cache payment manifests.

components/payments/content/android/component_jni_registrar.cc

 // 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/content/android/component_jni_registrar.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/macros.h"
 #include "components/payments/content/android/currency_formatter_android.h"
 #include "components/payments/content/android/origin_security_checker_android.h"
 #include "components/payments/content/android/payment_details_validation_android.h"
-#include "components/payments/content/android/payment_manifest_downloader_android.h"
-#include "components/payments/content/android/payment_manifest_parser_android.h"
 
 namespace payments {
 namespace android {
 
 static base::android::RegistrationMethod kPaymentsRegisteredMethods[] = {
     {"CurrencyFormatter", CurrencyFormatterAndroid::Register},
     {"OriginSecurityChecker", RegisterOriginSecurityChecker},
-    {"PaymentManifestDownloader", RegisterPaymentManifestDownloader},
-    {"PaymentManifestParser", RegisterPaymentManifestParser},
     {"PaymentValidator", RegisterPaymentValidator},
 };
 
 bool RegisterPayments(JNIEnv* env) {
   return base::android::RegisterNativeMethods(
       env, kPaymentsRegisteredMethods, arraysize(kPaymentsRegisteredMethods));
 }
 
 }  // namespace android
 }  // namespace payments