Download web payment manifests.

components/payments/android/payment_manifest_downloader_android.h

Index: components/payments/android/payment_manifest_downloader_android.h
diff --git a/components/payments/android/payment_manifest_downloader_android.h b/components/payments/android/payment_manifest_downloader_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..4427c0b2ced5f08dd55861674eff7bf31412e243
--- /dev/null
+++ b/components/payments/android/payment_manifest_downloader_android.h
@@ -0,0 +1,12 @@
+// 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_MANIFEST_DOWNLOADER_ANDROID_H_
+#define COMPONENTS_PAYMENTS_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_ANDROID_H_
+
+#include <jni.h>
+
+bool RegisterPaymentManifestDownloader(JNIEnv* env);
+
+#endif  // COMPONENTS_PAYMENTS_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_ANDROID_H_