[Payments] Cache payment manifests.

components/payments/content/android/component_jni_registrar.cc

Index: components/payments/content/android/component_jni_registrar.cc
diff --git a/components/payments/content/android/component_jni_registrar.cc b/components/payments/content/android/component_jni_registrar.cc
index d95a597ca0d6bcb2c3ff7327cfd862df28e42420..56a486301534e144cea1316ef0b7ac19e3d34dcd 100644
--- a/components/payments/content/android/component_jni_registrar.cc
+++ b/components/payments/content/android/component_jni_registrar.cc
@@ -10,8 +10,6 @@
 #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 {
@@ -19,8 +17,6 @@ namespace android {
 static base::android::RegistrationMethod kPaymentsRegisteredMethods[] = {
     {"CurrencyFormatter", CurrencyFormatterAndroid::Register},
     {"OriginSecurityChecker", RegisterOriginSecurityChecker},
-    {"PaymentManifestDownloader", RegisterPaymentManifestDownloader},
-    {"PaymentManifestParser", RegisterPaymentManifestParser},
     {"PaymentValidator", RegisterPaymentValidator},
 };