[Payments] Cache payment manifests.

components/payments/content/android/payment_manifest_downloader_android.h

Index: components/payments/content/android/payment_manifest_downloader_android.h
diff --git a/components/payments/content/android/payment_manifest_downloader_android.h b/components/payments/content/android/payment_manifest_downloader_android.h
deleted file mode 100644
index 12f2306d64635b477229f7ea385e74849490c34a..0000000000000000000000000000000000000000
--- a/components/payments/content/android/payment_manifest_downloader_android.h
+++ /dev/null
@@ -1,16 +0,0 @@
-// 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_CONTENT_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_ANDROID_H_
-#define COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_ANDROID_H_
-
-#include <jni.h>
-
-namespace payments {
-
-bool RegisterPaymentManifestDownloader(JNIEnv* env);
-
-}  // namespace payments
-
-#endif  // COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_ANDROID_H_