Make payment manifest download/parse cross-platform

components/payments/content/payment_manifest_downloader.h

Index: components/payments/content/payment_manifest_downloader.h
diff --git a/components/payments/content/android/payment_manifest_downloader.h b/components/payments/content/payment_manifest_downloader.h
similarity index 93%
rename from components/payments/content/android/payment_manifest_downloader.h
rename to components/payments/content/payment_manifest_downloader.h
index eb02b61e28a6bec28fb3674e28ad111bf99356e3..7ef171da57227c0299f1963e63532baf0a4307d4 100644
--- a/components/payments/content/android/payment_manifest_downloader.h
+++ b/components/payments/content/payment_manifest_downloader.h
@@ -2,8 +2,8 @@
 // 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_H_
-#define COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_H_
+#ifndef COMPONENTS_PAYMENTS_CONTENT_PAYMENT_MANIFEST_DOWNLOADER_H_
+#define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_MANIFEST_DOWNLOADER_H_
 
 #include <memory>
 #include <string>
@@ -95,4 +95,4 @@ class PaymentManifestDownloader : public net::URLFetcherDelegate {
 
 }  // namespace payments
 
-#endif  // COMPONENTS_PAYMENTS_CONTENT_ANDROID_PAYMENT_MANIFEST_DOWNLOADER_H_
+#endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_MANIFEST_DOWNLOADER_H_